642235214 has 16 divisors (see below), whose sum is σ = 1031486400. Its totient is φ = 298831104.

The previous prime is 642235201. The next prime is 642235273. The reversal of 642235214 is 412532246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103094 + ... + 109145.

It is an arithmetic number, because the mean of its divisors is an integer number (64467900).

Almost surely, 2^642235214 is an apocalyptic number.

642235214 is a deficient number, since it is larger than the sum of its proper divisors (389251186).

642235214 is a wasteful number, since it uses less digits than its factorization.

642235214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212347.

The product of its digits is 11520, while the sum is 29.

The square root of 642235214 is about 25342.3600716271. The cubic root of 642235214 is about 862.7759650151.

The spelling of 642235214 in words is "six hundred forty-two million, two hundred thirty-five thousand, two hundred fourteen".