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1331025 = 35217747
BaseRepresentation
bin101000100111101010001
32111121211020
411010331101
5320043100
644310053
714212353
oct5047521
92447736
101331025
1182a023
12542329
13377ab7
142690d3
151b45a0
hex144f51

1331025 has 12 divisors (see below), whose sum is σ = 2200752. Its totient is φ = 709840.

The previous prime is 1331023. The next prime is 1331039. The reversal of 1331025 is 5201331.

It is a happy number.

It is not a de Polignac number, because 1331025 - 21 = 1331023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 1330995 and 1331013.

It is not an unprimeable number, because it can be changed into a prime (1331023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8799 + ... + 8948.

It is an arithmetic number, because the mean of its divisors is an integer number (183396).

21331025 is an apocalyptic number.

1331025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331025 is a deficient number, since it is larger than the sum of its proper divisors (869727).

1331025 is a wasteful number, since it uses less digits than its factorization.

1331025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17760 (or 17755 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1331025 is about 1153.7005677384. The cubic root of 1331025 is about 110.0006887009. Note that the first 3 decimals are identical.

Adding to 1331025 its reverse (5201331), we get a palindrome (6532356).

The spelling of 1331025 in words is "one million, three hundred thirty-one thousand, twenty-five".

Divisors: 1 3 5 15 25 75 17747 53241 88735 266205 443675 1331025