642267574 has 8 divisors (see below), whose sum is σ = 1037509200. Its totient is φ = 296431176.

The previous prime is 642267547. The next prime is 642267589. The reversal of 642267574 is 475762246.

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

It is a super-2 number, since 2×642267574² = 825015273223690952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642267574.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12351274 + ... + 12351325.

It is an arithmetic number, because the mean of its divisors is an integer number (129688650).

Almost surely, 2^642267574 is an apocalyptic number.

642267574 is a deficient number, since it is larger than the sum of its proper divisors (395241626).

642267574 is a wasteful number, since it uses less digits than its factorization.

642267574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24702614.

The product of its digits is 564480, while the sum is 43.

The square root of 642267574 is about 25342.9985203014. The cubic root of 642267574 is about 862.7904555323.

The spelling of 642267574 in words is "six hundred forty-two million, two hundred sixty-seven thousand, five hundred seventy-four".