1256315 has 4 divisors (see below), whose sum is σ = 1507584. Its totient is φ = 1005048.

The previous prime is 1256303. The next prime is 1256323. The reversal of 1256315 is 5136521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1256315 - 2¹² = 1252219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125627 + ... + 125636.

It is an arithmetic number, because the mean of its divisors is an integer number (376896).

2^1256315 is an apocalyptic number.

1256315 is a deficient number, since it is larger than the sum of its proper divisors (251269).

1256315 is an equidigital number, since it uses as much as digits as its factorization.

1256315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251268.

The product of its digits is 900, while the sum is 23.

The square root of 1256315 is about 1120.8545846808. The cubic root of 1256315 is about 107.9028332737.

The spelling of 1256315 in words is "one million, two hundred fifty-six thousand, three hundred fifteen".