625386421 has 16 divisors (see below), whose sum is σ = 710317440. Its totient is φ = 545388480.

The previous prime is 625386403. The next prime is 625386473. The reversal of 625386421 is 124683526.

625386421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 625386421 - 2²⁷ = 491168693 is a prime.

It is a super-2 number, since 2×625386421² = 782216351142378482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625386521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43840 + ... + 56326.

It is an arithmetic number, because the mean of its divisors is an integer number (44394840).

Almost surely, 2^625386421 is an apocalyptic number.

It is an amenable number.

625386421 is a deficient number, since it is larger than the sum of its proper divisors (84931019).

625386421 is a wasteful number, since it uses less digits than its factorization.

625386421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12684.

The product of its digits is 69120, while the sum is 37.

The square root of 625386421 is about 25007.7272257996. The cubic root of 625386421 is about 855.1641425338.

The spelling of 625386421 in words is "six hundred twenty-five million, three hundred eighty-six thousand, four hundred twenty-one".