2499891 has 8 divisors (see below), whose sum is σ = 3410880. Its totient is φ = 1627752.

The previous prime is 2499881. The next prime is 2499907. The reversal of 2499891 is 1989942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2499891 - 2⁵ = 2499859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2499821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9561 + ... + 9818.

It is an arithmetic number, because the mean of its divisors is an integer number (426360).

2^2499891 is an apocalyptic number.

2499891 is a deficient number, since it is larger than the sum of its proper divisors (910989).

2499891 is a wasteful number, since it uses less digits than its factorization.

2499891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19425.

The product of its digits is 46656, while the sum is 42.

The square root of 2499891 is about 1581.1043608820. The cubic root of 2499891 is about 135.7189083243.

The spelling of 2499891 in words is "two million, four hundred ninety-nine thousand, eight hundred ninety-one".