1297337921 has 12 divisors (see below), whose sum is σ = 1444060800. Its totient is φ = 1164460440.

The previous prime is 1297337887. The next prime is 1297337929.

1297337921 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1297337921 - 2¹⁰ = 1297336897 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297337929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58301 + ... + 77418.

It is an arithmetic number, because the mean of its divisors is an integer number (120338400).

Almost surely, 2^1297337921 is an apocalyptic number.

1297337921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1297337921 is a deficient number, since it is larger than the sum of its proper divisors (146722879).

1297337921 is a wasteful number, since it uses less digits than its factorization.

1297337921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135820 (or 135809 counting only the distinct ones).

The product of its digits is 142884, while the sum is 44.

The square root of 1297337921 is about 36018.5774427586. The cubic root of 1297337921 is about 1090.6474062670.

The spelling of 1297337921 in words is "one billion, two hundred ninety-seven million, three hundred thirty-seven thousand, nine hundred twenty-one".