1256728 has 16 divisors (see below), whose sum is σ = 2570760. Its totient is φ = 571200.

The previous prime is 1256711. The next prime is 1256729. The reversal of 1256728 is 8276521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7053 + ... + 7228.

2^1256728 is an apocalyptic number.

It is an amenable number.

1256728 is an abundant number, since it is smaller than the sum of its proper divisors (1314032).

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

1256728 is a wasteful number, since it uses less digits than its factorization.

1256728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14298 (or 14294 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 1256728 is about 1121.0388039671. The cubic root of 1256728 is about 107.9146559423.

The spelling of 1256728 in words is "one million, two hundred fifty-six thousand, seven hundred twenty-eight".