655257425 has 12 divisors (see below), whose sum is σ = 825841116. Its totient is φ = 515611200.

The previous prime is 655257377. The next prime is 655257431. The reversal of 655257425 is 524752556.

It can be written as a sum of positive squares in 6 ways, for example, as 357625921 + 297631504 = 18911^2 + 17252^2 .

It is a de Polignac number, because none of the positive numbers 2^k-655257425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213314 + ... + 216363.

It is an arithmetic number, because the mean of its divisors is an integer number (68820093).

Almost surely, 2^655257425 is an apocalyptic number.

It is an amenable number.

655257425 is a deficient number, since it is larger than the sum of its proper divisors (170583691).

655257425 is a wasteful number, since it uses less digits than its factorization.

655257425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429748 (or 429743 counting only the distinct ones).

The product of its digits is 420000, while the sum is 41.

The square root of 655257425 is about 25597.9965036329. The cubic root of 655257425 is about 868.5683173373.

The spelling of 655257425 in words is "six hundred fifty-five million, two hundred fifty-seven thousand, four hundred twenty-five".