1312540413 has 4 divisors (see below), whose sum is σ = 1750053888. Its totient is φ = 875026940.

The previous prime is 1312540399. The next prime is 1312540423. The reversal of 1312540413 is 3140452131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312540413 - 2⁵ = 1312540381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312540423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218756733 + ... + 218756738.

It is an arithmetic number, because the mean of its divisors is an integer number (437513472).

Almost surely, 2^1312540413 is an apocalyptic number.

It is an amenable number.

1312540413 is a deficient number, since it is larger than the sum of its proper divisors (437513475).

1312540413 is an equidigital number, since it uses as much as digits as its factorization.

1312540413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437513474.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1312540413 is about 36228.9996135692. Note that the first 3 decimals coincide. The cubic root of 1312540413 is about 1094.8910222857.

Adding to 1312540413 its reverse (3140452131), we get a palindrome (4452992544).

The spelling of 1312540413 in words is "one billion, three hundred twelve million, five hundred forty thousand, four hundred thirteen".