256947514 has 4 divisors (see below), whose sum is σ = 385421274. Its totient is φ = 128473756.

The previous prime is 256947491. The next prime is 256947521. The reversal of 256947514 is 415749652.

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., 256544289 + 403225 = 16017^2 + 635^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64236877 + ... + 64236880.

Almost surely, 2^256947514 is an apocalyptic number.

256947514 is a deficient number, since it is larger than the sum of its proper divisors (128473760).

256947514 is a wasteful number, since it uses less digits than its factorization.

256947514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128473759.

The product of its digits is 302400, while the sum is 43.

The square root of 256947514 is about 16029.5824649303. The cubic root of 256947514 is about 635.7428337424.

The spelling of 256947514 in words is "two hundred fifty-six million, nine hundred forty-seven thousand, five hundred fourteen".