1312520307 has 8 divisors (see below), whose sum is σ = 2000030976. Its totient is φ = 750011592.

The previous prime is 1312520281. The next prime is 1312520311. The reversal of 1312520307 is 7030252131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312520307 - 2⁷ = 1312520179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312520707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31250463 + ... + 31250504.

It is an arithmetic number, because the mean of its divisors is an integer number (250003872).

Almost surely, 2^1312520307 is an apocalyptic number.

1312520307 is a deficient number, since it is larger than the sum of its proper divisors (687510669).

1312520307 is an equidigital number, since it uses as much as digits as its factorization.

1312520307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62500977.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1312520307 is about 36228.7221276158. The cubic root of 1312520307 is about 1094.8854316029.

Adding to 1312520307 its reverse (7030252131), we get a palindrome (8342772438).

The spelling of 1312520307 in words is "one billion, three hundred twelve million, five hundred twenty thousand, three hundred seven".