2912491 has 16 divisors (see below), whose sum is σ = 3317760. Its totient is φ = 2540160.

The previous prime is 2912479. The next prime is 2912501. The reversal of 2912491 is 1942192.

It is a happy number.

2912491 is a nontrivial binomial coefficient, being equal to C(2414, 2).

It is a 7-Lehmer number, since φ(2912491) divides (2912491-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 2912491 - 2¹³ = 2904299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2912401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22870 + ... + 22996.

It is an arithmetic number, because the mean of its divisors is an integer number (207360).

2^2912491 is an apocalyptic number.

2912491 is the 2413-rd triangular number and also the 1207-th hexagonal number.

2912491 is the 805-th centered nonagonal number.

2912491 is a deficient number, since it is larger than the sum of its proper divisors (405269).

2912491 is a wasteful number, since it uses less digits than its factorization.

2912491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

The product of its digits is 1296, while the sum is 28.

The square root of 2912491 is about 1706.6021797713. The cubic root of 2912491 is about 142.8087651905.

Subtracting from 2912491 its reverse (1942192), we obtain a cube (970299 = 99³).

It can be divided in two parts, 2912 and 491, that added together give a triangular number (3403 = T₈₂).

The spelling of 2912491 in words is "two million, nine hundred twelve thousand, four hundred ninety-one".