2491092 has 18 divisors (see below), whose sum is σ = 6297018. Its totient is φ = 830352.

The previous prime is 2491091. The next prime is 2491117. The reversal of 2491092 is 2901942.

It can be written as a sum of positive squares in only one way, i.e., 2414916 + 76176 = 1554^2 + 276^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34563 + ... + 34634.

2^2491092 is an apocalyptic number.

It is an amenable number.

2491092 is an abundant number, since it is smaller than the sum of its proper divisors (3805926).

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

2491092 is a wasteful number, since it uses less digits than its factorization.

2491092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69207 (or 69202 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2491092 is about 1578.3193593186. The cubic root of 2491092 is about 135.5594887728.

Subtracting from 2491092 its product of nonzero digits (1296), we obtain a triangular number (2489796 = T₂₂₃₁).

The spelling of 2491092 in words is "two million, four hundred ninety-one thousand, ninety-two".