642241256 has 32 divisors (see below), whose sum is σ = 1224288000. Its totient is φ = 315808320.

The previous prime is 642241253. The next prime is 642241273. The reversal of 642241256 is 652142246.

642241256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (642241253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120161 + ... + 125391.

It is an arithmetic number, because the mean of its divisors is an integer number (38259000).

Almost surely, 2^642241256 is an apocalyptic number.

It is an amenable number.

642241256 is a deficient number, since it is larger than the sum of its proper divisors (582046744).

642241256 is a wasteful number, since it uses less digits than its factorization.

642241256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5489 (or 5485 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 642241256 is about 25342.4792788709. The cubic root of 642241256 is about 862.7786706054.

The spelling of 642241256 in words is "six hundred forty-two million, two hundred forty-one thousand, two hundred fifty-six".