1297513988 has 12 divisors (see below), whose sum is σ = 2313492300. Its totient is φ = 636516192.

The previous prime is 1297513963. The next prime is 1297513991. The reversal of 1297513988 is 8893157921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1065500164 + 232013824 = 32642^2 + 15232^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3059963 + ... + 3060386.

It is an arithmetic number, because the mean of its divisors is an integer number (192791025).

Almost surely, 2^1297513988 is an apocalyptic number.

It is an amenable number.

1297513988 is a deficient number, since it is larger than the sum of its proper divisors (1015978312).

1297513988 is a wasteful number, since it uses less digits than its factorization.

1297513988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120406 (or 6120404 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 53.

The square root of 1297513988 is about 36021.0214735785. The cubic root of 1297513988 is about 1090.6967427654.

The spelling of 1297513988 in words is "one billion, two hundred ninety-seven million, five hundred thirteen thousand, nine hundred eighty-eight".