625214621 has 4 divisors (see below), whose sum is σ = 626707200. Its totient is φ = 623722044.

The previous prime is 625214609. The next prime is 625214647. The reversal of 625214621 is 126412526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 625214621 - 2¹⁴ = 625198237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625214671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745661 + ... + 746498.

It is an arithmetic number, because the mean of its divisors is an integer number (156676800).

Almost surely, 2^625214621 is an apocalyptic number.

It is an amenable number.

625214621 is a deficient number, since it is larger than the sum of its proper divisors (1492579).

625214621 is a wasteful number, since it uses less digits than its factorization.

625214621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492578.

The product of its digits is 5760, while the sum is 29.

The square root of 625214621 is about 25004.2920515659. The cubic root of 625214621 is about 855.0858279377.

The spelling of 625214621 in words is "six hundred twenty-five million, two hundred fourteen thousand, six hundred twenty-one".