1256213 has 12 divisors (see below), whose sum is σ = 1510272. Its totient is φ = 1040760.

The previous prime is 1256209. The next prime is 1256231. The reversal of 1256213 is 3126521.

It is not a de Polignac number, because 1256213 - 2² = 1256209 is a prime.

It is a super-2 number, since 2×1256213² = 3156142202738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1106 + ... + 1932.

It is an arithmetic number, because the mean of its divisors is an integer number (125856).

2^1256213 is an apocalyptic number.

It is an amenable number.

1256213 is a deficient number, since it is larger than the sum of its proper divisors (254059).

1256213 is an equidigital number, since it uses as much as digits as its factorization.

1256213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 865 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 1256213 is about 1120.8090827612. The cubic root of 1256213 is about 107.8999129905.

It can be divided in two parts, 12562 and 13, that multiplied together give a triangular number (163306 = T₅₇₁).

The spelling of 1256213 in words is "one million, two hundred fifty-six thousand, two hundred thirteen".