621416425 has 24 divisors (see below), whose sum is σ = 881578496. Its totient is φ = 425658240.

The previous prime is 621416417. The next prime is 621416429. The reversal of 621416425 is 524614126.

It is a happy number.

It is not a de Polignac number, because 621416425 - 2³ = 621416417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621416429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288904 + ... + 291046.

Almost surely, 2^621416425 is an apocalyptic number.

It is an amenable number.

621416425 is a deficient number, since it is larger than the sum of its proper divisors (260162071).

621416425 is a wasteful number, since it uses less digits than its factorization.

621416425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3817 (or 3812 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 621416425 is about 24928.2254683321. The cubic root of 621416425 is about 853.3507530047.

The spelling of 621416425 in words is "six hundred twenty-one million, four hundred sixteen thousand, four hundred twenty-five".