256922 has 4 divisors (see below), whose sum is σ = 385386. Its totient is φ = 128460.

The previous prime is 256903. The next prime is 256931. The reversal of 256922 is 229652.

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., 249001 + 7921 = 499^2 + 89^2 .

It is a d-powerful number, because it can be written as 2¹⁰ + 5² + 9⁵ + 6³ + 2¹⁶ + 2¹⁷ .

It is a junction number, because it is equal to n+sod(n) for n = 256891 and 256900.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64229 + ... + 64232.

2²⁵⁶⁹²² is an apocalyptic number.

256922 is a deficient number, since it is larger than the sum of its proper divisors (128464).

256922 is a wasteful number, since it uses less digits than its factorization.

256922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128463.

The product of its digits is 2160, while the sum is 26.

The square root of 256922 is about 506.8747379777. The cubic root of 256922 is about 63.5721790691.

The spelling of 256922 in words is "two hundred fifty-six thousand, nine hundred twenty-two".