1275231531 has 32 divisors (see below), whose sum is σ = 2111488000. Its totient is φ = 668075040.

The previous prime is 1275231499. The next prime is 1275231541. The reversal of 1275231531 is 1351325721.

It is not a de Polignac number, because 1275231531 - 2⁵ = 1275231499 is a prime.

It is a super-2 number, since 2×1275231531² = 3252430915313207922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275231541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39181 + ... + 63918.

It is an arithmetic number, because the mean of its divisors is an integer number (65984000).

Almost surely, 2^1275231531 is an apocalyptic number.

1275231531 is a deficient number, since it is larger than the sum of its proper divisors (836256469).

1275231531 is a wasteful number, since it uses less digits than its factorization.

1275231531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103159.

The product of its digits is 6300, while the sum is 30.

The square root of 1275231531 is about 35710.3840780241. The cubic root of 1275231531 is about 1084.4170755083.

The spelling of 1275231531 in words is "one billion, two hundred seventy-five million, two hundred thirty-one thousand, five hundred thirty-one".