256124242 has 16 divisors (see below), whose sum is σ = 420292800. Its totient is φ = 116092240.

The previous prime is 256124221. The next prime is 256124243. The reversal of 256124242 is 242421652.

It is a self number, because there is not a number n which added to its sum of digits gives 256124242.

It is not an unprimeable number, because it can be changed into a prime (256124243) 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, 8317 + ... + 24112.

It is an arithmetic number, because the mean of its divisors is an integer number (26268300).

Almost surely, 2^256124242 is an apocalyptic number.

256124242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256124242 is a deficient number, since it is larger than the sum of its proper divisors (164168558).

256124242 is a wasteful number, since it uses less digits than its factorization.

256124242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32801.

The product of its digits is 7680, while the sum is 28.

The square root of 256124242 is about 16003.8820915427. The cubic root of 256124242 is about 635.0631239044.

Adding to 256124242 its reverse (242421652), we get a palindrome (498545894).

The spelling of 256124242 in words is "two hundred fifty-six million, one hundred twenty-four thousand, two hundred forty-two".