421742631 has 8 divisors (see below), whose sum is σ = 580463104. Its totient is φ = 272091960.

The previous prime is 421742617. The next prime is 421742641. The reversal of 421742631 is 136247124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421742631 - 2⁵ = 421742599 is a prime.

It is a super-2 number, since 2×421742631² = 355733693605604322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421742641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2267341 + ... + 2267526.

It is an arithmetic number, because the mean of its divisors is an integer number (72557888).

Almost surely, 2^421742631 is an apocalyptic number.

421742631 is a deficient number, since it is larger than the sum of its proper divisors (158720473).

421742631 is a wasteful number, since it uses less digits than its factorization.

421742631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534901.

The product of its digits is 8064, while the sum is 30.

The square root of 421742631 is about 20536.3733653243. The cubic root of 421742631 is about 749.9215509057.

Adding to 421742631 its reverse (136247124), we get a palindrome (557989755).

The spelling of 421742631 in words is "four hundred twenty-one million, seven hundred forty-two thousand, six hundred thirty-one".