256164142 has 8 divisors (see below), whose sum is σ = 413803656. Its totient is φ = 118229592.

The previous prime is 256164131. The next prime is 256164149. The reversal of 256164142 is 241461652.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256164149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4926208 + ... + 4926259.

It is an arithmetic number, because the mean of its divisors is an integer number (51725457).

Almost surely, 2^256164142 is an apocalyptic number.

256164142 is a deficient number, since it is larger than the sum of its proper divisors (157639514).

256164142 is a wasteful number, since it uses less digits than its factorization.

256164142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9852482.

The product of its digits is 11520, while the sum is 31.

The square root of 256164142 is about 16005.1286155407. The cubic root of 256164142 is about 635.0960997013.

The spelling of 256164142 in words is "two hundred fifty-six million, one hundred sixty-four thousand, one hundred forty-two".