1297691060 has 12 divisors (see below), whose sum is σ = 2725151268. Its totient is φ = 519076416.

The previous prime is 1297691033. The next prime is 1297691071. The reversal of 1297691060 is 601967921.

It can be written as a sum of positive squares in 2 ways, for example, as 273307024 + 1024384036 = 16532^2 + 32006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1297690999 and 1297691017.

It is a congruent number.

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, 32442257 + ... + 32442296.

It is an arithmetic number, because the mean of its divisors is an integer number (227095939).

Almost surely, 2^1297691060 is an apocalyptic number.

1297691060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297691060 is an abundant number, since it is smaller than the sum of its proper divisors (1427460208).

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

1297691060 is a wasteful number, since it uses less digits than its factorization.

1297691060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64884562 (or 64884560 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1297691060 is about 36023.4792878200. The cubic root of 1297691060 is about 1090.7463563779.

The spelling of 1297691060 in words is "one billion, two hundred ninety-seven million, six hundred ninety-one thousand, sixty".