621209425 has 12 divisors (see below), whose sum is σ = 772343920. Its totient is φ = 495648720.

The previous prime is 621209423. The next prime is 621209429. The reversal of 621209425 is 524902126.

It is not a de Polignac number, because 621209425 - 2¹ = 621209423 is a prime.

It is a super-2 number, since 2×621209425² = 771802299417661250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621209423) 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, 23307 + ... + 42256.

Almost surely, 2^621209425 is an apocalyptic number.

It is an amenable number.

621209425 is a deficient number, since it is larger than the sum of its proper divisors (151134495).

621209425 is a wasteful number, since it uses less digits than its factorization.

621209425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65952 (or 65947 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 621209425 is about 24924.0732024282. The cubic root of 621209425 is about 853.2559892702.

The spelling of 621209425 in words is "six hundred twenty-one million, two hundred nine thousand, four hundred twenty-five".