1290087272 has 24 divisors (see below), whose sum is σ = 2505213750. Its totient is φ = 622797504.

The previous prime is 1290087269. The next prime is 1290087277. The reversal of 1290087272 is 2727800921.

It can be written as a sum of positive squares in 3 ways, for example, as 785905156 + 504182116 = 28034^2 + 22454^2 .

It is not an unprimeable number, because it can be changed into a prime (1290087277) 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, 89147 + ... + 102602.

Almost surely, 2^1290087272 is an apocalyptic number.

It is an amenable number.

1290087272 is a deficient number, since it is larger than the sum of its proper divisors (1215126478).

1290087272 is a wasteful number, since it uses less digits than its factorization.

1290087272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191813 (or 191780 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 1290087272 is about 35917.7848982924. The cubic root of 1290087272 is about 1088.6117815260.

The spelling of 1290087272 in words is "one billion, two hundred ninety million, eighty-seven thousand, two hundred seventy-two".