642264205 has 8 divisors (see below), whose sum is σ = 840782304. Its totient is φ = 467101200.

The previous prime is 642264191. The next prime is 642264223. The reversal of 642264205 is 502462246.

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

It is not a de Polignac number, because 642264205 - 2²⁷ = 508046477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5838711 + ... + 5838820.

It is an arithmetic number, because the mean of its divisors is an integer number (105097788).

Almost surely, 2^642264205 is an apocalyptic number.

It is an amenable number.

642264205 is a deficient number, since it is larger than the sum of its proper divisors (198518099).

642264205 is a wasteful number, since it uses less digits than its factorization.

642264205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11677547.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 642264205 is about 25342.9320521521. The cubic root of 642264205 is about 862.7889469471.

The spelling of 642264205 in words is "six hundred forty-two million, two hundred sixty-four thousand, two hundred five".