642205334 has 4 divisors (see below), whose sum is σ = 963308004. Its totient is φ = 321102666.

The previous prime is 642205313. The next prime is 642205351. The reversal of 642205334 is 433502246.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 642205297 and 642205306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160551332 + ... + 160551335.

It is an arithmetic number, because the mean of its divisors is an integer number (240827001).

Almost surely, 2^642205334 is an apocalyptic number.

642205334 is a deficient number, since it is larger than the sum of its proper divisors (321102670).

642205334 is a wasteful number, since it uses less digits than its factorization.

642205334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321102669.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 642205334 is about 25341.7705379873. The cubic root of 642205334 is about 862.7625845873.

The spelling of 642205334 in words is "six hundred forty-two million, two hundred five thousand, three hundred thirty-four".