1312645 has 8 divisors (see below), whose sum is σ = 1594656. Its totient is φ = 1037136.

The previous prime is 1312637. The next prime is 1312657. The reversal of 1312645 is 5462131.

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 1312645 - 2³ = 1312637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167 + ... + 1996.

It is an arithmetic number, because the mean of its divisors is an integer number (199332).

2^1312645 is an apocalyptic number.

It is an amenable number.

1312645 is a deficient number, since it is larger than the sum of its proper divisors (282011).

1312645 is an equidigital number, since it uses as much as digits as its factorization.

1312645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251.

The product of its digits is 720, while the sum is 22.

The square root of 1312645 is about 1145.7072051794. The cubic root of 1312645 is about 109.4920102870.

Adding to 1312645 its reverse (5462131), we get a palindrome (6774776).

The spelling of 1312645 in words is "one million, three hundred twelve thousand, six hundred forty-five".