642262431 has 8 divisors (see below), whose sum is σ = 906723504. Its totient is φ = 402988160.

The previous prime is 642262393. The next prime is 642262447. The reversal of 642262431 is 134262246.

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

It is a cyclic number.

It is not a de Polignac number, because 642262431 - 2⁷ = 642262303 is a prime.

It is a super-2 number, since 2×642262431² = 825002060548059522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642262031) 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, 6296640 + ... + 6296741.

It is an arithmetic number, because the mean of its divisors is an integer number (113340438).

Almost surely, 2^642262431 is an apocalyptic number.

642262431 is a deficient number, since it is larger than the sum of its proper divisors (264461073).

642262431 is a wasteful number, since it uses less digits than its factorization.

642262431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12593401.

The product of its digits is 13824, while the sum is 30.

The square root of 642262431 is about 25342.8970522314. The cubic root of 642262431 is about 862.7881525757.

The spelling of 642262431 in words is "six hundred forty-two million, two hundred sixty-two thousand, four hundred thirty-one".