642231467 has 4 divisors (see below), whose sum is σ = 643619040. Its totient is φ = 640843896.

The previous prime is 642231451. The next prime is 642231487. The reversal of 642231467 is 764132246.

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 642231467 - 2⁴ = 642231451 is a prime.

It is a super-2 number, since 2×642231467² = 824922514409944178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642231487) 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, 693092 + ... + 694017.

It is an arithmetic number, because the mean of its divisors is an integer number (160904760).

Almost surely, 2^642231467 is an apocalyptic number.

642231467 is a deficient number, since it is larger than the sum of its proper divisors (1387573).

642231467 is a wasteful number, since it uses less digits than its factorization.

642231467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387572.

The product of its digits is 48384, while the sum is 35.

The square root of 642231467 is about 25342.2861439137. The cubic root of 642231467 is about 862.7742871107.

The spelling of 642231467 in words is "six hundred forty-two million, two hundred thirty-one thousand, four hundred sixty-seven".