409256 has 8 divisors (see below), whose sum is σ = 767370. Its totient is φ = 204624.

The previous prime is 409237. The next prime is 409259. The reversal of 409256 is 652904.

It can be written as a sum of positive squares in only one way, i.e., 220900 + 188356 = 470^2 + 434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (409259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25571 + ... + 25586.

2⁴⁰⁹²⁵⁶ is an apocalyptic number.

It is an amenable number.

409256 is a deficient number, since it is larger than the sum of its proper divisors (358114).

409256 is a wasteful number, since it uses less digits than its factorization.

409256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51163 (or 51159 counting only the distinct ones).

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

The square root of 409256 is about 639.7311935493. The cubic root of 409256 is about 74.2446250649.

The spelling of 409256 in words is "four hundred nine thousand, two hundred fifty-six".