2505687 has 16 divisors (see below), whose sum is σ = 3507840. Its totient is φ = 1588832.

The previous prime is 2505683. The next prime is 2505691. The reversal of 2505687 is 7865052.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2505683) and next prime (2505691).

It is a cyclic number.

It is not a de Polignac number, because 2505687 - 2² = 2505683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7048 + ... + 7394.

It is an arithmetic number, because the mean of its divisors is an integer number (219240).

2^2505687 is an apocalyptic number.

2505687 is a deficient number, since it is larger than the sum of its proper divisors (1002153).

2505687 is a wasteful number, since it uses less digits than its factorization.

2505687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 2505687 is about 1582.9361958083. The cubic root of 2505687 is about 135.8237155129.

The spelling of 2505687 in words is "two million, five hundred five thousand, six hundred eighty-seven".