1290256 has 20 divisors (see below), whose sum is σ = 2727504. Its totient is φ = 586400.

The previous prime is 1290209. The next prime is 1290257. The reversal of 1290256 is 6520921.

It is a self number, because there is not a number n which added to its sum of digits gives 1290256.

It is not an unprimeable number, because it can be changed into a prime (1290257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3490 + ... + 3841.

2^1290256 is an apocalyptic number.

1290256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1290256 is an abundant number, since it is smaller than the sum of its proper divisors (1437248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1290256 is a wasteful number, since it uses less digits than its factorization.

1290256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7350 (or 7344 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1290256 is about 1135.8943612854. The cubic root of 1290256 is about 108.8659238595.

The spelling of 1290256 in words is "one million, two hundred ninety thousand, two hundred fifty-six".