1256461213 has 8 divisors (see below), whose sum is σ = 1444766528. Its totient is φ = 1070358624.

The previous prime is 1256461201. The next prime is 1256461229. The reversal of 1256461213 is 3121646521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256461213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256461253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549456 + ... + 551737.

It is an arithmetic number, because the mean of its divisors is an integer number (180595816).

Almost surely, 2^1256461213 is an apocalyptic number.

It is an amenable number.

1256461213 is a deficient number, since it is larger than the sum of its proper divisors (188305315).

1256461213 is a wasteful number, since it uses less digits than its factorization.

1256461213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101363.

The product of its digits is 8640, while the sum is 31.

The square root of 1256461213 is about 35446.5966349380. The cubic root of 1256461213 is about 1079.0701910949.

The spelling of 1256461213 in words is "one billion, two hundred fifty-six million, four hundred sixty-one thousand, two hundred thirteen".