420537621 has 32 divisors (see below), whose sum is σ = 676915200. Its totient is φ = 226860480.

The previous prime is 420537617. The next prime is 420537709. The reversal of 420537621 is 126735024.

It is not a de Polignac number, because 420537621 - 2² = 420537617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420537521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122395 + ... + 125783.

It is an arithmetic number, because the mean of its divisors is an integer number (21153600).

Almost surely, 2^420537621 is an apocalyptic number.

It is an amenable number.

420537621 is a deficient number, since it is larger than the sum of its proper divisors (256377579).

420537621 is a wasteful number, since it uses less digits than its factorization.

420537621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 420537621 is about 20507.0139464526. The cubic root of 420537621 is about 749.2066401806.

The spelling of 420537621 in words is "four hundred twenty million, five hundred thirty-seven thousand, six hundred twenty-one".