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1530169 = 12372
BaseRepresentation
bin101110101100100111001
32212201222221
411311210321
5342431134
652444041
716002064
oct5654471
92781887
101530169
11955703
12619621
13417634
142bb8db
152035b4
hex175939

1530169 has 3 divisors (see below), whose sum is σ = 1531407. Its totient is φ = 1528932.

The previous prime is 1530157. The next prime is 1530173. The reversal of 1530169 is 9610351.

The square root of 1530169 is 1237.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9610351 = 14964499.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 374544 = 1075^2 + 612^2 .

It is a de Polignac number, because none of the positive numbers 2k-1530169 is a prime.

It is a super-2 number, since 2×15301692 = 4682834337122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1530149) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 619 + ... + 1855.

It is an arithmetic number, because the mean of its divisors is an integer number (510469).

21530169 is an apocalyptic number.

1530169 is the 1237-th square number.

1530169 is the 619-th centered octagonal number.

It is an amenable number.

1530169 is a deficient number, since it is larger than the sum of its proper divisors (1238).

1530169 is an frugal number, since it uses more digits than its factorization.

1530169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 25.

The cubic root of 1530169 is about 115.2337777510.

Multiplying 1530169 by its sum of digits (25), we get a square (38254225 = 61852).

The spelling of 1530169 in words is "one million, five hundred thirty thousand, one hundred sixty-nine".

Divisors: 1 1237 1530169