2490191 has 4 divisors (see below), whose sum is σ = 2716584. Its totient is φ = 2263800.

The previous prime is 2490161. The next prime is 2490209. The reversal of 2490191 is 1910942.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2490191 - 2⁶ = 2490127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2490191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2490101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113180 + ... + 113201.

It is an arithmetic number, because the mean of its divisors is an integer number (679146).

2^2490191 is an apocalyptic number.

2490191 is a deficient number, since it is larger than the sum of its proper divisors (226393).

2490191 is a wasteful number, since it uses less digits than its factorization.

2490191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226392.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2490191 is about 1578.0339033113. The cubic root of 2490191 is about 135.5431433537.

The spelling of 2490191 in words is "two million, four hundred ninety thousand, one hundred ninety-one".