1312455537 has 6 divisors (see below), whose sum is σ = 1895769122. Its totient is φ = 874970352.

The previous prime is 1312455517. The next prime is 1312455541. The reversal of 1312455537 is 7355542131.

It can be written as a sum of positive squares in only one way, i.e., 934891776 + 377563761 = 30576^2 + 19431^2 .

It is not a de Polignac number, because 1312455537 - 2⁷ = 1312455409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312455517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72914188 + ... + 72914205.

Almost surely, 2^1312455537 is an apocalyptic number.

It is an amenable number.

1312455537 is a deficient number, since it is larger than the sum of its proper divisors (583313585).

1312455537 is a wasteful number, since it uses less digits than its factorization.

1312455537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145828399 (or 145828396 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 1312455537 is about 36227.8282125771. The cubic root of 1312455537 is about 1094.8674212413.

Adding to 1312455537 its reverse (7355542131), we get a palindrome (8667997668).

The spelling of 1312455537 in words is "one billion, three hundred twelve million, four hundred fifty-five thousand, five hundred thirty-seven".