642272145 has 16 divisors (see below), whose sum is σ = 1037065920. Its totient is φ = 339401664.

The previous prime is 642272131. The next prime is 642272161. The reversal of 642272145 is 541272246.

It is not a de Polignac number, because 642272145 - 2⁴ = 642272129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194779 + ... + 198048.

It is an arithmetic number, because the mean of its divisors is an integer number (64816620).

Almost surely, 2^642272145 is an apocalyptic number.

It is an amenable number.

642272145 is a deficient number, since it is larger than the sum of its proper divisors (394793775).

642272145 is a wasteful number, since it uses less digits than its factorization.

642272145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392944.

The product of its digits is 26880, while the sum is 33.

The square root of 642272145 is about 25343.0887028397. The cubic root of 642272145 is about 862.7925023458.

The spelling of 642272145 in words is "six hundred forty-two million, two hundred seventy-two thousand, one hundred forty-five".