1297791 has 12 divisors (see below), whose sum is σ = 2045160. Its totient is φ = 786480.

The previous prime is 1297781. The next prime is 1297799. The reversal of 1297791 is 1977921.

It is not a de Polignac number, because 1297791 - 2⁶ = 1297727 is a prime.

It is a super-2 number, since 2×1297791² = 3368522959362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297799) 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, 6456 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (170430).

2^1297791 is an apocalyptic number.

1297791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1297791 is a deficient number, since it is larger than the sum of its proper divisors (747369).

1297791 is a wasteful number, since it uses less digits than its factorization.

1297791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13126 (or 13123 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 1297791 is about 1139.2063026511. The cubic root of 1297791 is about 109.0774356466.

It can be divided in two parts, 1 and 297791, that added together give a palindrome (297792).

The spelling of 1297791 in words is "one million, two hundred ninety-seven thousand, seven hundred ninety-one".