2505987 has 24 divisors (see below), whose sum is σ = 4183920. Its totient is φ = 1428480.

The previous prime is 2505983. The next prime is 2505989. The reversal of 2505987 is 7895052.

It is not a de Polignac number, because 2505987 - 2² = 2505983 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2505983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 939 + ... + 2427.

It is an arithmetic number, because the mean of its divisors is an integer number (174330).

2^2505987 is an apocalyptic number.

2505987 is a deficient number, since it is larger than the sum of its proper divisors (1677933).

2505987 is a wasteful number, since it uses less digits than its factorization.

2505987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 2505987 is about 1583.0309535824. The cubic root of 2505987 is about 135.8291359144.

The spelling of 2505987 in words is "two million, five hundred five thousand, nine hundred eighty-seven".