1296885 has 16 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 669120.

The previous prime is 1296877. The next prime is 1296899. The reversal of 1296885 is 5886921.

It is not a de Polignac number, because 1296885 - 2³ = 1296877 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 930 + ... + 1859.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

2^1296885 is an apocalyptic number.

1296885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1296885 is the 930-th pentagonal number.

It is an amenable number.

1296885 is a deficient number, since it is larger than the sum of its proper divisors (845835).

1296885 is a wasteful number, since it uses less digits than its factorization.

1296885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828.

The product of its digits is 34560, while the sum is 39.

The square root of 1296885 is about 1138.8085879550. The cubic root of 1296885 is about 109.0520470793.

The spelling of 1296885 in words is "one million, two hundred ninety-six thousand, eight hundred eighty-five".