1296891 has 16 divisors (see below), whose sum is σ = 1948320. Its totient is φ = 863136.

The previous prime is 1296877. The next prime is 1296899. The reversal of 1296891 is 1986921.

It is not a de Polignac number, because 1296891 - 2¹⁰ = 1295867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1296899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1891 + ... + 2483.

It is an arithmetic number, because the mean of its divisors is an integer number (121770).

2^1296891 is an apocalyptic number.

1296891 is a deficient number, since it is larger than the sum of its proper divisors (651429).

1296891 is an frugal number, since it uses more digits than its factorization.

1296891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 596 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1296891 is about 1138.8112222840. The cubic root of 1296891 is about 109.0522152544.

Subtracting from 1296891 its sum of digits (36), we obtain a triangular number (1296855 = T₁₆₁₀).

It can be divided in two parts, 1296 and 891, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1296891 in words is "one million, two hundred ninety-six thousand, eight hundred ninety-one".