625520121 has 32 divisors (see below), whose sum is σ = 886394880. Its totient is φ = 391569024.

The previous prime is 625520099. The next prime is 625520123. The reversal of 625520121 is 121025526.

It is a happy number.

It is not a de Polignac number, because 625520121 - 2⁵ = 625520089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 625520091 and 625520100.

It is not an unprimeable number, because it can be changed into a prime (625520123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1368525 + ... + 1368981.

It is an arithmetic number, because the mean of its divisors is an integer number (27699840).

Almost surely, 2^625520121 is an apocalyptic number.

It is an amenable number.

625520121 is a deficient number, since it is larger than the sum of its proper divisors (260874759).

625520121 is a wasteful number, since it uses less digits than its factorization.

625520121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 625520121 is about 25010.4002566932. The cubic root of 625520121 is about 855.2250794176.

Adding to 625520121 its reverse (121025526), we get a palindrome (746545647).

The spelling of 625520121 in words is "six hundred twenty-five million, five hundred twenty thousand, one hundred twenty-one".