2487891 has 8 divisors (see below), whose sum is σ = 3791104. Its totient is φ = 1421640.

The previous prime is 2487883. The next prime is 2487907. The reversal of 2487891 is 1987842.

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

It is not a de Polignac number, because 2487891 - 2³ = 2487883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2487811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59215 + ... + 59256.

It is an arithmetic number, because the mean of its divisors is an integer number (473888).

2^2487891 is an apocalyptic number.

2487891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2487891 is a deficient number, since it is larger than the sum of its proper divisors (1303213).

2487891 is a wasteful number, since it uses less digits than its factorization.

2487891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118481.

The product of its digits is 32256, while the sum is 39.

The square root of 2487891 is about 1577.3049800213. The cubic root of 2487891 is about 135.5014002025.

The spelling of 2487891 in words is "two million, four hundred eighty-seven thousand, eight hundred ninety-one".