2691156 has 36 divisors (see below), whose sum is σ = 6804672. Its totient is φ = 827424.

The previous prime is 2691149. The next prime is 2691163. The reversal of 2691156 is 6511962.

It is an interprime number because it is at equal distance from previous prime (2691149) and next prime (2691163).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1365 + ... + 2691.

2^2691156 is an apocalyptic number.

2691156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2691156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3402336).

2691156 is an abundant number, since it is smaller than the sum of its proper divisors (4113516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2691156 is a wasteful number, since it uses less digits than its factorization.

2691156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1345 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 2691156 is about 1640.4743216521. The cubic root of 2691156 is about 139.0954608820.

The spelling of 2691156 in words is "two million, six hundred ninety-one thousand, one hundred fifty-six".