1271512072531 has 4 divisors (see below), whose sum is σ = 1275353499064. Its totient is φ = 1267670646000.

The previous prime is 1271512072511. The next prime is 1271512072553. The reversal of 1271512072531 is 1352702151721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271512072531 is a prime.

It is a super-2 number, since 2×1271512072531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271512072511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1920712770 + ... + 1920713431.

It is an arithmetic number, because the mean of its divisors is an integer number (318838374766).

Almost surely, 2^{1271512072531} is an apocalyptic number.

1271512072531 is a deficient number, since it is larger than the sum of its proper divisors (3841426533).

1271512072531 is an equidigital number, since it uses as much as digits as its factorization.

1271512072531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841426532.

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 1271512072531 in words is "one trillion, two hundred seventy-one billion, five hundred twelve million, seventy-two thousand, five hundred thirty-one".