1312945 has 16 divisors (see below), whose sum is σ = 1663488. Its totient is φ = 993600.

The previous prime is 1312937. The next prime is 1312951. The reversal of 1312945 is 5492131.

1312945 = T₁₄ + T₁₅ + ... + T₁₉₈.

It is not a de Polignac number, because 1312945 - 2³ = 1312937 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 (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8620 + ... + 8770.

It is an arithmetic number, because the mean of its divisors is an integer number (103968).

2^1312945 is an apocalyptic number.

It is an amenable number.

1312945 is a deficient number, since it is larger than the sum of its proper divisors (350543).

1312945 is a wasteful number, since it uses less digits than its factorization.

1312945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its digits is 1080, while the sum is 25.

The square root of 1312945 is about 1145.8381212021. The cubic root of 1312945 is about 109.5003509785.

The spelling of 1312945 in words is "one million, three hundred twelve thousand, nine hundred forty-five".