256434542 has 96 divisors (see below), whose sum is σ = 512354304. Its totient is φ = 95256000.

The previous prime is 256434539. The next prime is 256434547. The reversal of 256434542 is 245434652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256434547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1698167 + ... + 1698317.

It is an arithmetic number, because the mean of its divisors is an integer number (5337024).

Almost surely, 2^256434542 is an apocalyptic number.

256434542 is a deficient number, since it is larger than the sum of its proper divisors (255919762).

256434542 is a wasteful number, since it uses less digits than its factorization.

256434542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 247 counting only the distinct ones).

The product of its digits is 115200, while the sum is 35.

The square root of 256434542 is about 16013.5736798505. The cubic root of 256434542 is about 635.3194845915.

The spelling of 256434542 in words is "two hundred fifty-six million, four hundred thirty-four thousand, five hundred forty-two".