2521487 has 4 divisors (see below), whose sum is σ = 2528520. Its totient is φ = 2514456.

The previous prime is 2521481. The next prime is 2521489. The reversal of 2521487 is 7841252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521481) 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 3 ways as a sum of consecutive naturals, for example, 2948 + ... + 3705.

It is an arithmetic number, because the mean of its divisors is an integer number (632130).

2^2521487 is an apocalyptic number.

2521487 is a deficient number, since it is larger than the sum of its proper divisors (7033).

2521487 is an equidigital number, since it uses as much as digits as its factorization.

2521487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032.

The product of its digits is 4480, while the sum is 29.

The square root of 2521487 is about 1587.9190785427. The cubic root of 2521487 is about 136.1086034184.

It can be divided in two parts, 25 and 21487, that added together give a palindrome (21512).

The spelling of 2521487 in words is "two million, five hundred twenty-one thousand, four hundred eighty-seven".