2487591 has 24 divisors (see below), whose sum is σ = 3865680. Its totient is φ = 1596672.

The previous prime is 2487587. The next prime is 2487599. The reversal of 2487591 is 1957842.

It is not a de Polignac number, because 2487591 - 2² = 2487587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2487599) 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 23 ways as a sum of consecutive naturals, for example, 6871 + ... + 7223.

It is an arithmetic number, because the mean of its divisors is an integer number (161070).

2^2487591 is an apocalyptic number.

2487591 is a deficient number, since it is larger than the sum of its proper divisors (1378089).

2487591 is an equidigital number, since it uses as much as digits as its factorization.

2487591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 385 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2487591 is about 1577.2098782343. The cubic root of 2487591 is about 135.4959535472.

The spelling of 2487591 in words is "two million, four hundred eighty-seven thousand, five hundred ninety-one".