1297869 has 8 divisors (see below), whose sum is σ = 1770912. Its totient is φ = 845040.

The previous prime is 1297853. The next prime is 1297873. The reversal of 1297869 is 9687921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1297869 - 2⁴ = 1297853 is a prime.

It is a super-2 number, since 2×1297869² = 3368927882322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1297869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297169) by changing a digit.

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, 4902 + ... + 5159.

It is an arithmetic number, because the mean of its divisors is an integer number (221364).

2^1297869 is an apocalyptic number.

It is an amenable number.

1297869 is a deficient number, since it is larger than the sum of its proper divisors (473043).

1297869 is a wasteful number, since it uses less digits than its factorization.

1297869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10107.

The product of its digits is 54432, while the sum is 42.

The square root of 1297869 is about 1139.2405364979. The cubic root of 1297869 is about 109.0796208648.

It can be divided in two parts, 129786 and 9, that added together give a triangular number (129795 = T₅₀₉).

The spelling of 1297869 in words is "one million, two hundred ninety-seven thousand, eight hundred sixty-nine".