25135487 has 4 divisors (see below), whose sum is σ = 27069000. Its totient is φ = 23201976.

The previous prime is 25135441. The next prime is 25135493. The reversal of 25135487 is 78453152.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25135487 - 2¹⁰ = 25134463 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 (25135417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966737 + ... + 966762.

It is an arithmetic number, because the mean of its divisors is an integer number (6767250).

Almost surely, 2^25135487 is an apocalyptic number.

25135487 is a deficient number, since it is larger than the sum of its proper divisors (1933513).

25135487 is a wasteful number, since it uses less digits than its factorization.

25135487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933512.

The product of its digits is 33600, while the sum is 35.

The square root of 25135487 is about 5013.5303928469. The cubic root of 25135487 is about 292.9290443098.

It can be divided in two parts, 2513 and 5487, that added together give a cube (8000 = 20³).

The spelling of 25135487 in words is "twenty-five million, one hundred thirty-five thousand, four hundred eighty-seven".