256734242 has 4 divisors (see below), whose sum is σ = 385101366. Its totient is φ = 128367120.

The previous prime is 256734229. The next prime is 256734253. The reversal of 256734242 is 242437652.

256734242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 214886281 + 41847961 = 14659^2 + 6469^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64183559 + ... + 64183562.

Almost surely, 2^256734242 is an apocalyptic number.

256734242 is a deficient number, since it is larger than the sum of its proper divisors (128367124).

256734242 is a wasteful number, since it uses less digits than its factorization.

256734242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128367123.

The product of its digits is 80640, while the sum is 35.

The square root of 256734242 is about 16022.9286336799. The cubic root of 256734242 is about 635.5668916158.

The spelling of 256734242 in words is "two hundred fifty-six million, seven hundred thirty-four thousand, two hundred forty-two".