625423521 has 8 divisors (see below), whose sum is σ = 870154560. Its totient is φ = 398820752.

The previous prime is 625423511. The next prime is 625423531. The reversal of 625423521 is 125324526.

It is an interprime number because it is at equal distance from previous prime (625423511) and next prime (625423531).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625423521 - 2⁶ = 625423457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (625423511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4531986 + ... + 4532123.

It is an arithmetic number, because the mean of its divisors is an integer number (108769320).

Almost surely, 2^625423521 is an apocalyptic number.

It is an amenable number.

625423521 is a deficient number, since it is larger than the sum of its proper divisors (244731039).

625423521 is a wasteful number, since it uses less digits than its factorization.

625423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9064135.

The product of its digits is 14400, while the sum is 30.

The square root of 625423521 is about 25008.4689855257. The cubic root of 625423521 is about 855.1810525920.

The spelling of 625423521 in words is "six hundred twenty-five million, four hundred twenty-three thousand, five hundred twenty-one".