1297988 has 6 divisors (see below), whose sum is σ = 2271486. Its totient is φ = 648992.

The previous prime is 1297979. The next prime is 1297993. The reversal of 1297988 is 8897921.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 114244 = 1088^2 + 338^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162245 + ... + 162252.

It is an arithmetic number, because the mean of its divisors is an integer number (378581).

2^1297988 is an apocalyptic number.

It is an amenable number.

1297988 is a deficient number, since it is larger than the sum of its proper divisors (973498).

1297988 is a wasteful number, since it uses less digits than its factorization.

1297988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324501 (or 324499 counting only the distinct ones).

The product of its digits is 72576, while the sum is 44.

The square root of 1297988 is about 1139.2927630772. The cubic root of 1297988 is about 109.0829545547.

The spelling of 1297988 in words is "one million, two hundred ninety-seven thousand, nine hundred eighty-eight".