1296989 has 4 divisors (see below), whose sum is σ = 1301856. Its totient is φ = 1292124.

The previous prime is 1296983. The next prime is 1297001. The reversal of 1296989 is 9896921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9896921 = 167 ⋅59263.

It is a cyclic number.

It is not a de Polignac number, because 1296989 - 2⁴ = 1296973 is a prime.

It is a super-2 number, since 2×1296989² = 3364360932242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2009 + ... + 2574.

It is an arithmetic number, because the mean of its divisors is an integer number (325464).

2^1296989 is an apocalyptic number.

It is an amenable number.

1296989 is a deficient number, since it is larger than the sum of its proper divisors (4867).

1296989 is an equidigital number, since it uses as much as digits as its factorization.

1296989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866.

The product of its digits is 69984, while the sum is 44.

The square root of 1296989 is about 1138.8542487957. The cubic root of 1296989 is about 109.0549620409.

The spelling of 1296989 in words is "one million, two hundred ninety-six thousand, nine hundred eighty-nine".