1296981 has 36 divisors (see below), whose sum is σ = 2320812. Its totient is φ = 693504.

The previous prime is 1296973. The next prime is 1296983. The reversal of 1296981 is 1896921.

It can be written as a sum of positive squares in 2 ways, for example, as 1102500 + 194481 = 1050^2 + 441^2 .

It is not a de Polignac number, because 1296981 - 2³ = 1296973 is a prime.

It is a super-2 number, since 2×1296981² = 3364319428722, which contains 22 as substring.

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

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7411 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (64467).

2^1296981 is an apocalyptic number.

It is an amenable number.

1296981 is a deficient number, since it is larger than the sum of its proper divisors (1023831).

1296981 is a wasteful number, since it uses less digits than its factorization.

1296981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 200 counting only the distinct ones).

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

The square root of 1296981 is about 1138.8507364883. The cubic root of 1296981 is about 109.0547378186.

The spelling of 1296981 in words is "one million, two hundred ninety-six thousand, nine hundred eighty-one".