1256901 has 8 divisors (see below), whose sum is σ = 1683840. Its totient is φ = 833952.

The previous prime is 1256897. The next prime is 1256903. The reversal of 1256901 is 1096521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1256901 - 2² = 1256897 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256903) 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 7 ways as a sum of consecutive naturals, for example, 160 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (210480).

2^1256901 is an apocalyptic number.

It is an amenable number.

1256901 is a deficient number, since it is larger than the sum of its proper divisors (426939).

1256901 is a wasteful number, since it uses less digits than its factorization.

1256901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1256901 is about 1121.1159618880. The cubic root of 1256901 is about 107.9196075253.

The spelling of 1256901 in words is "one million, two hundred fifty-six thousand, nine hundred one".