421456931 has 4 divisors (see below), whose sum is σ = 481665072. Its totient is φ = 361248792.

The previous prime is 421456909. The next prime is 421456939. The reversal of 421456931 is 139654124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421456931 - 2²² = 417262627 is a prime.

It is a super-2 number, since 2×421456931² = 355251889375877522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421456891 and 421456900.

It is not an unprimeable number, because it can be changed into a prime (421456939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30104060 + ... + 30104073.

It is an arithmetic number, because the mean of its divisors is an integer number (120416268).

Almost surely, 2^421456931 is an apocalyptic number.

421456931 is a deficient number, since it is larger than the sum of its proper divisors (60208141).

421456931 is an equidigital number, since it uses as much as digits as its factorization.

421456931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60208140.

The product of its digits is 25920, while the sum is 35.

The square root of 421456931 is about 20529.4162362206. The cubic root of 421456931 is about 749.7521735258.

The spelling of 421456931 in words is "four hundred twenty-one million, four hundred fifty-six thousand, nine hundred thirty-one".