25087621 has 8 divisors (see below), whose sum is σ = 27091064. Its totient is φ = 23094720.

The previous prime is 25087609. The next prime is 25087627. The reversal of 25087621 is 12678052.

It can be written as a sum of positive squares in 4 ways, for example, as 6477025 + 18610596 = 2545^2 + 4314^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25087621 - 2⁹ = 25087109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25087627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2731 + ... + 7591.

It is an arithmetic number, because the mean of its divisors is an integer number (3386383).

Almost surely, 2^25087621 is an apocalyptic number.

It is an amenable number.

25087621 is a deficient number, since it is larger than the sum of its proper divisors (2003443).

25087621 is a wasteful number, since it uses less digits than its factorization.

25087621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 25087621 is about 5008.7544359851. The cubic root of 25087621 is about 292.7429826481.

The spelling of 25087621 in words is "twenty-five million, eighty-seven thousand, six hundred twenty-one".