1256880 has 40 divisors (see below), whose sum is σ = 3897072. Its totient is φ = 335104.

The previous prime is 1256873. The next prime is 1256887. The reversal of 1256880 is 886521.

It is an interprime number because it is at equal distance from previous prime (1256873) and next prime (1256887).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1256887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2379 + ... + 2858.

2^1256880 is an apocalyptic number.

1256880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256880 is an abundant number, since it is smaller than the sum of its proper divisors (2640192).

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

1256880 is a wasteful number, since it uses less digits than its factorization.

1256880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253 (or 5247 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1256880 is about 1121.1065961808. The cubic root of 1256880 is about 107.9190064903.

The spelling of 1256880 in words is "one million, two hundred fifty-six thousand, eight hundred eighty".