1256983 has 16 divisors (see below), whose sum is σ = 1630720. Its totient is φ = 940896.

The previous prime is 1256953. The next prime is 1256989. The reversal of 1256983 is 3896521.

It is a cyclic number.

It is not a de Polignac number, because 1256983 - 2¹⁷ = 1125911 is a prime.

It is an alternating number because its digits alternate between odd and even.

1256983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366 + ... + 2092.

It is an arithmetic number, because the mean of its divisors is an integer number (101920).

2^1256983 is an apocalyptic number.

1256983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1256983 is a deficient number, since it is larger than the sum of its proper divisors (373737).

1256983 is a wasteful number, since it uses less digits than its factorization.

1256983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766.

The product of its digits is 12960, while the sum is 34.

The square root of 1256983 is about 1121.1525319955. The cubic root of 1256983 is about 107.9219543596.

The spelling of 1256983 in words is "one million, two hundred fifty-six thousand, nine hundred eighty-three".