256136142 has 16 divisors (see below), whose sum is σ = 534545280. Its totient is φ = 81666552.

The previous prime is 256136137. The next prime is 256136171. The reversal of 256136142 is 241631652.

It is a super-3 number, since 3×256136142³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927892 + ... + 928167.

It is an arithmetic number, because the mean of its divisors is an integer number (33409080).

Almost surely, 2^256136142 is an apocalyptic number.

256136142 is an abundant number, since it is smaller than the sum of its proper divisors (278409138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256136142 is a wasteful number, since it uses less digits than its factorization.

256136142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856087.

The product of its digits is 8640, while the sum is 30.

The square root of 256136142 is about 16004.2538720179. The cubic root of 256136142 is about 635.0729591495.

Adding to 256136142 its reverse (241631652), we get a palindrome (497767794).

The spelling of 256136142 in words is "two hundred fifty-six million, one hundred thirty-six thousand, one hundred forty-two".