421372431 has 6 divisors (see below), whose sum is σ = 608649080. Its totient is φ = 280914948.

The previous prime is 421372417. The next prime is 421372451. The reversal of 421372431 is 134273124.

It is a happy number.

It is not a de Polignac number, because 421372431 - 2⁹ = 421371919 is a prime.

It is a super-2 number, since 2×421372431² = 355109451213699522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421372395 and 421372404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421372451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23409571 + ... + 23409588.

Almost surely, 2^421372431 is an apocalyptic number.

421372431 is a deficient number, since it is larger than the sum of its proper divisors (187276649).

421372431 is a wasteful number, since it uses less digits than its factorization.

421372431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46819165 (or 46819162 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 421372431 is about 20527.3581105801. The cubic root of 421372431 is about 749.7020629937.

The spelling of 421372431 in words is "four hundred twenty-one million, three hundred seventy-two thousand, four hundred thirty-one".