1256900 has 18 divisors (see below), whose sum is σ = 2727690. Its totient is φ = 502720.

The previous prime is 1256897. The next prime is 1256903. The reversal of 1256900 is 96521.

1256900 = T₄₇ + T₄₈ + ... + T₁₉₆.

It is an interprime number because it is at equal distance from previous prime (1256897) and next prime (1256903).

It can be written as a sum of positive squares in 3 ways, for example, as 399424 + 857476 = 632^2 + 926^2 .

It is a super-2 number, since 2×1256900² = 3159595220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1256903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6185 + ... + 6384.

2^1256900 is an apocalyptic number.

1256900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256900 is an abundant number, since it is smaller than the sum of its proper divisors (1470790).

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

1256900 is a wasteful number, since it uses less digits than its factorization.

1256900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12583 (or 12576 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1256900 is about 1121.1155159037. The cubic root of 1256900 is about 107.9195789047.

The spelling of 1256900 in words is "one million, two hundred fifty-six thousand, nine hundred".