420566121 has 32 divisors (see below), whose sum is σ = 662428800. Its totient is φ = 262958400.

The previous prime is 420566099. The next prime is 420566123. The reversal of 420566121 is 121665024.

420566121 is a `hidden beast` number, since 42 + 0 + 5 + 6 + 612 + 1 = 666.

It is not a de Polignac number, because 420566121 - 2⁵ = 420566089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (420566123) 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, 47755 + ... + 55871.

It is an arithmetic number, because the mean of its divisors is an integer number (20700900).

Almost surely, 2^420566121 is an apocalyptic number.

It is an amenable number.

420566121 is a deficient number, since it is larger than the sum of its proper divisors (241862679).

420566121 is a wasteful number, since it uses less digits than its factorization.

420566121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8246 (or 8240 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 420566121 is about 20507.7088188808. The cubic root of 420566121 is about 749.2235644745.

The spelling of 420566121 in words is "four hundred twenty million, five hundred sixty-six thousand, one hundred twenty-one".