1275131456 has 28 divisors (see below), whose sum is σ = 2532746268. Its totient is φ = 636959232.

The previous prime is 1275131453. The next prime is 1275131509. The reversal of 1275131456 is 6541315721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 523494400 + 751637056 = 22880^2 + 27416^2 .

It is not an unprimeable number, because it can be changed into a prime (1275131453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62570 + ... + 80406.

Almost surely, 2^1275131456 is an apocalyptic number.

1275131456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1275131456 is a deficient number, since it is larger than the sum of its proper divisors (1257614812).

1275131456 is a wasteful number, since it uses less digits than its factorization.

1275131456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18966 (or 18956 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 1275131456 is about 35708.9828474573. The cubic root of 1275131456 is about 1084.3887078812.

The spelling of 1275131456 in words is "one billion, two hundred seventy-five million, one hundred thirty-one thousand, four hundred fifty-six".