1297270836 has 24 divisors (see below), whose sum is σ = 3363295040. Its totient is φ = 432423576.

The previous prime is 1297270823. The next prime is 1297270841. The reversal of 1297270836 is 6380727921.

It is a super-2 number, since 2×1297270836² = 3365823243872277792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1297270791 and 1297270800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6005776 + ... + 6005991.

Almost surely, 2^1297270836 is an apocalyptic number.

It is an amenable number.

1297270836 is an abundant number, since it is smaller than the sum of its proper divisors (2066024204).

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

1297270836 is a wasteful number, since it uses less digits than its factorization.

1297270836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011780 (or 12011772 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 1297270836 is about 36017.6461751736. The cubic root of 1297270836 is about 1090.6286069136.

The spelling of 1297270836 in words is "one billion, two hundred ninety-seven million, two hundred seventy thousand, eight hundred thirty-six".