25987715 has 16 divisors (see below), whose sum is σ = 33995808. Its totient is φ = 18955776.

The previous prime is 25987711. The next prime is 25987721. The reversal of 25987715 is 51778952.

It is a cyclic number.

It is not a de Polignac number, because 25987715 - 2² = 25987711 is a prime.

It is a super-2 number, since 2×25987715² = 1350722661842450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25987711) 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, 2987 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (2124738).

Almost surely, 2^25987715 is an apocalyptic number.

25987715 is a deficient number, since it is larger than the sum of its proper divisors (8008093).

25987715 is a wasteful number, since it uses less digits than its factorization.

25987715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4918.

The product of its digits is 176400, while the sum is 44.

The square root of 25987715 is about 5097.8147279006. The cubic root of 25987715 is about 296.2029401769.

The spelling of 25987715 in words is "twenty-five million, nine hundred eighty-seven thousand, seven hundred fifteen".