1312957 has 6 divisors (see below), whose sum is σ = 1386078. Its totient is φ = 1243512.

The previous prime is 1312951. The next prime is 1312963. The reversal of 1312957 is 7592131.

It is an interprime number because it is at equal distance from previous prime (1312951) and next prime (1312963).

It can be written as a sum of positive squares in only one way, i.e., 763876 + 549081 = 874^2 + 741^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1312957 is a prime.

It is a Duffinian number.

1312957 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1458 + ... + 2179.

It is an arithmetic number, because the mean of its divisors is an integer number (231013).

2^1312957 is an apocalyptic number.

It is an amenable number.

1312957 is a deficient number, since it is larger than the sum of its proper divisors (73121).

1312957 is an equidigital number, since it uses as much as digits as its factorization.

1312957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675 (or 3656 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 1312957 is about 1145.8433575319. The cubic root of 1312957 is about 109.5006845797.

The spelling of 1312957 in words is "one million, three hundred twelve thousand, nine hundred fifty-seven".