1297541812172 has 12 divisors (see below), whose sum is σ = 2270706678240. Its totient is φ = 648768475536.

The previous prime is 1297541812169. The next prime is 1297541812187. The reversal of 1297541812172 is 2712181457921.

It is a super-2 number, since 2×1297541812172² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1297541812172.

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, 1173854 + ... + 1993242.

It is an arithmetic number, because the mean of its divisors is an integer number (189225556520).

Almost surely, 2^{1297541812172} is an apocalyptic number.

It is an amenable number.

1297541812172 is a deficient number, since it is larger than the sum of its proper divisors (973164866068).

1297541812172 is a wasteful number, since it uses less digits than its factorization.

1297541812172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215280 (or 1215278 counting only the distinct ones).

The product of its digits is 564480, while the sum is 50.

The spelling of 1297541812172 in words is "one trillion, two hundred ninety-seven billion, five hundred forty-one million, eight hundred twelve thousand, one hundred seventy-two".