1312452521 has 2 divisors, whose sum is σ = 1312452522. Its totient is φ = 1312452520.

The previous prime is 1312452511. The next prime is 1312452529. The reversal of 1312452521 is 1252542131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1080042496 + 232410025 = 32864^2 + 15245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312452521 - 2¹⁴ = 1312436137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312452529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656226260 + 656226261.

It is an arithmetic number, because the mean of its divisors is an integer number (656226261).

Almost surely, 2^1312452521 is an apocalyptic number.

It is an amenable number.

1312452521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312452521 is an equidigital number, since it uses as much as digits as its factorization.

1312452521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 1312452521 is about 36227.7865870936. The cubic root of 1312452521 is about 1094.8665825785.

Adding to 1312452521 its reverse (1252542131), we get a palindrome (2564994652).

The spelling of 1312452521 in words is "one billion, three hundred twelve million, four hundred fifty-two thousand, five hundred twenty-one".