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1520289 = 341372
BaseRepresentation
bin101110011001010100001
32212020110000
411303022201
5342122124
652330213
715631221
oct5631241
92766400
101520289
11949241
12613969
13412ca4
142b8081
152006c9
hex1732a1

1520289 has 15 divisors (see below), whose sum is σ = 2287747. Its totient is φ = 1006128.

The previous prime is 1520287. The next prime is 1520291. The reversal of 1520289 is 9820251.

The square root of 1520289 is 1233.

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

It is an interprime number because it is at equal distance from previous prime (1520287) and next prime (1520291).

It can be written as a sum of positive squares in only one way, i.e., 893025 + 627264 = 945^2 + 792^2 .

It is not a de Polignac number, because 1520289 - 21 = 1520287 is a prime.

It is a super-2 number, since 2×15202892 = 4622557287042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1520287) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 11029 + ... + 11165.

21520289 is an apocalyptic number.

1520289 is the 1233-rd square number.

1520289 is the 617-th centered octagonal number.

It is an amenable number.

1520289 is a deficient number, since it is larger than the sum of its proper divisors (767458).

1520289 is an frugal number, since it uses more digits than its factorization.

1520289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The cubic root of 1520289 is about 114.9852280963.

The spelling of 1520289 in words is "one million, five hundred twenty thousand, two hundred eighty-nine".

Divisors: 1 3 9 27 81 137 411 1233 3699 11097 18769 56307 168921 506763 1520289