2521987 has 6 divisors (see below), whose sum is σ = 2731092. Its totient is φ = 2327832.

The previous prime is 2521979. The next prime is 2522011. The reversal of 2521987 is 7891252.

It is not a de Polignac number, because 2521987 - 2³ = 2521979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2524987) 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, 7293 + ... + 7630.

It is an arithmetic number, because the mean of its divisors is an integer number (455182).

2^2521987 is an apocalyptic number.

2521987 is a deficient number, since it is larger than the sum of its proper divisors (209105).

2521987 is a wasteful number, since it uses less digits than its factorization.

2521987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14949 (or 14936 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 2521987 is about 1588.0765094919. The cubic root of 2521987 is about 136.1175994069.

The spelling of 2521987 in words is "two million, five hundred twenty-one thousand, nine hundred eighty-seven".