1256660 has 24 divisors (see below), whose sum is σ = 2778720. Its totient is φ = 476064.

The previous prime is 1256659. The next prime is 1256681. The reversal of 1256660 is 666521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274 + ... + 2033.

It is an arithmetic number, because the mean of its divisors is an integer number (115780).

2^1256660 is an apocalyptic number.

1256660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256660 is an abundant number, since it is smaller than the sum of its proper divisors (1522060).

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

1256660 is a wasteful number, since it uses less digits than its factorization.

1256660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335 (or 3333 counting only the distinct ones).

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

The square root of 1256660 is about 1121.0084745442. The cubic root of 1256660 is about 107.9127095309.

The spelling of 1256660 in words is "one million, two hundred fifty-six thousand, six hundred sixty".