420727621 has 16 divisors (see below), whose sum is σ = 466819200. Its totient is φ = 377552448.

The previous prime is 420727603. The next prime is 420727627. The reversal of 420727621 is 126727024.

It is a cyclic number.

It is not a de Polignac number, because 420727621 - 2⁷ = 420727493 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 (420727627) 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, 22000 + ... + 36406.

It is an arithmetic number, because the mean of its divisors is an integer number (29176200).

Almost surely, 2^420727621 is an apocalyptic number.

It is an amenable number.

420727621 is a deficient number, since it is larger than the sum of its proper divisors (46091579).

420727621 is a wasteful number, since it uses less digits than its factorization.

420727621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14508.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 420727621 is about 20511.6459846595. The cubic root of 420727621 is about 749.3194543673.

The spelling of 420727621 in words is "four hundred twenty million, seven hundred twenty-seven thousand, six hundred twenty-one".