642274505 has 16 divisors (see below), whose sum is σ = 790919424. Its totient is φ = 500465280.

The previous prime is 642274487. The next prime is 642274559. The reversal of 642274505 is 505472246.

It is not a de Polignac number, because 642274505 - 2¹⁶ = 642208969 is a prime.

It is a Duffinian number.

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, 43109 + ... + 56061.

It is an arithmetic number, because the mean of its divisors is an integer number (49432464).

Almost surely, 2^642274505 is an apocalyptic number.

It is an amenable number.

642274505 is a deficient number, since it is larger than the sum of its proper divisors (148644919).

642274505 is a wasteful number, since it uses less digits than its factorization.

642274505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13216.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 642274505 is about 25343.1352638145. The cubic root of 642274505 is about 862.7935591086.

The spelling of 642274505 in words is "six hundred forty-two million, two hundred seventy-four thousand, five hundred five".