1297487560 has 32 divisors (see below), whose sum is σ = 2923212600. Its totient is φ = 518307840.

The previous prime is 1297487557. The next prime is 1297487563. The reversal of 1297487560 is 657847921.

It is an interprime number because it is at equal distance from previous prime (1297487557) and next prime (1297487563).

It can be written as a sum of positive squares in 4 ways, for example, as 615337636 + 682149924 = 24806^2 + 26118^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1297487563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9670 + ... + 51850.

Almost surely, 2^1297487560 is an apocalyptic number.

1297487560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297487560 is an abundant number, since it is smaller than the sum of its proper divisors (1625725040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297487560 is a wasteful number, since it uses less digits than its factorization.

1297487560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42961 (or 42957 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 1297487560 is about 36020.6546303645. The cubic root of 1297487560 is about 1090.6893375455.

The spelling of 1297487560 in words is "one billion, two hundred ninety-seven million, four hundred eighty-seven thousand, five hundred sixty".