2646981 has 12 divisors (see below), whose sum is σ = 3837600. Its totient is φ = 1758120.

The previous prime is 2646967. The next prime is 2646983. The reversal of 2646981 is 1896462.

2646981 is a `hidden beast` number, since 2 + 646 + 9 + 8 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-2646981 is a prime.

It is a super-2 number, since 2×2646981² = 14013016828722, which contains 22 as substring.

2646981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4120 + ... + 4718.

It is an arithmetic number, because the mean of its divisors is an integer number (319800).

2^2646981 is an apocalyptic number.

It is an amenable number.

2646981 is a deficient number, since it is larger than the sum of its proper divisors (1190619).

2646981 is a wasteful number, since it uses less digits than its factorization.

2646981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1093 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2646981 is about 1626.9545168812. The cubic root of 2646981 is about 138.3301797639.

The spelling of 2646981 in words is "two million, six hundred forty-six thousand, nine hundred eighty-one".