1256113 has 8 divisors (see below), whose sum is σ = 1366632. Its totient is φ = 1149696.

The previous prime is 1256107. The next prime is 1256149. The reversal of 1256113 is 3116521.

1256113 = 792² + 793².

It can be written as a sum of positive squares in 4 ways, for example, as 242064 + 1014049 = 492^2 + 1007^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1256113 - 2⁹ = 1255601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256813) 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, 370 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (170829).

2^1256113 is an apocalyptic number.

1256113 is the 793-rd centered square number.

It is an amenable number.

1256113 is a deficient number, since it is larger than the sum of its proper divisors (110519).

1256113 is a wasteful number, since it uses less digits than its factorization.

1256113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051.

The product of its digits is 180, while the sum is 19.

The square root of 1256113 is about 1120.7644712427. The cubic root of 1256113 is about 107.8970498142.

It can be divided in two parts, 1256 and 113, that added together give a square (1369 = 37²).

The spelling of 1256113 in words is "one million, two hundred fifty-six thousand, one hundred thirteen".