2691081 has 12 divisors (see below), whose sum is σ = 3926208. Its totient is φ = 1776024.

The previous prime is 2691067. The next prime is 2691097. The reversal of 2691081 is 1801962.

It is a de Polignac number, because none of the positive numbers 2^k-2691081 is a prime.

It is a super-2 number, since 2×2691081² = 14483833897122, which contains 22 as substring.

2691081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2691001) 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, 525 + ... + 2378.

It is an arithmetic number, because the mean of its divisors is an integer number (327184).

2^2691081 is an apocalyptic number.

It is an amenable number.

2691081 is a deficient number, since it is larger than the sum of its proper divisors (1235127).

2691081 is a wasteful number, since it uses less digits than its factorization.

2691081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012 (or 3009 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2691081 is about 1640.4514622506. The cubic root of 2691081 is about 139.0941687165.

The spelling of 2691081 in words is "two million, six hundred ninety-one thousand, eighty-one".