655120025 has 12 divisors (see below), whose sum is σ = 928398912. Its totient is φ = 449225040.

The previous prime is 655120013. The next prime is 655120027. The reversal of 655120025 is 520021556.

It is not a de Polignac number, because 655120025 - 2⁴ = 655120009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655119976 and 655120003.

It is not an unprimeable number, because it can be changed into a prime (655120027) 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, 1871597 + ... + 1871946.

It is an arithmetic number, because the mean of its divisors is an integer number (77366576).

Almost surely, 2^655120025 is an apocalyptic number.

It is an amenable number.

655120025 is a deficient number, since it is larger than the sum of its proper divisors (273278887).

655120025 is a wasteful number, since it uses less digits than its factorization.

655120025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743560 (or 3743555 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 655120025 is about 25595.3125591386. The cubic root of 655120025 is about 868.5076034739.

The spelling of 655120025 in words is "six hundred fifty-five million, one hundred twenty thousand, twenty-five".