135897925 has 12 divisors (see below), whose sum is σ = 168823396. Its totient is φ = 108518400.

The previous prime is 135897919. The next prime is 135897947. The reversal of 135897925 is 529798531.

It can be written as a sum of positive squares in 6 ways, for example, as 1940449 + 133957476 = 1393^2 + 11574^2 .

It is not a de Polignac number, because 135897925 - 2³ = 135897917 is a prime.

It is a super-4 number, since 4×135897925⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9715 + ... + 19135.

Almost surely, 2^135897925 is an apocalyptic number.

It is an amenable number.

135897925 is a deficient number, since it is larger than the sum of its proper divisors (32925471).

135897925 is an equidigital number, since it uses as much as digits as its factorization.

135897925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008 (or 10003 counting only the distinct ones).

The product of its digits is 680400, while the sum is 49.

The square root of 135897925 is about 11657.5265386788. The cubic root of 135897925 is about 514.1276273180.

The spelling of 135897925 in words is "one hundred thirty-five million, eight hundred ninety-seven thousand, nine hundred twenty-five".