421257263 has 12 divisors (see below), whose sum is σ = 518860512. Its totient is φ = 339837120.

The previous prime is 421257251. The next prime is 421257301. The reversal of 421257263 is 362752124.

It is not a de Polignac number, because 421257263 - 2⁸ = 421257007 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 (421257763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252023 + ... + 253688.

It is an arithmetic number, because the mean of its divisors is an integer number (43238376).

Almost surely, 2^421257263 is an apocalyptic number.

421257263 is a deficient number, since it is larger than the sum of its proper divisors (97603249).

421257263 is a wasteful number, since it uses less digits than its factorization.

421257263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505742 (or 505735 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 421257263 is about 20524.5526869649. The cubic root of 421257263 is about 749.6337548114.

The spelling of 421257263 in words is "four hundred twenty-one million, two hundred fifty-seven thousand, two hundred sixty-three".