25058521 has 4 divisors (see below), whose sum is σ = 25087972. Its totient is φ = 25029072.

The previous prime is 25058519. The next prime is 25058543. The reversal of 25058521 is 12585052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8042896 + 17015625 = 2836^2 + 4125^2 .

It is a cyclic number.

It is not a de Polignac number, because 25058521 - 2¹ = 25058519 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25058521.

It is not an unprimeable number, because it can be changed into a prime (25058591) 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, 13410 + ... + 15163.

It is an arithmetic number, because the mean of its divisors is an integer number (6271993).

Almost surely, 2^25058521 is an apocalyptic number.

It is an amenable number.

25058521 is a deficient number, since it is larger than the sum of its proper divisors (29451).

25058521 is an equidigital number, since it uses as much as digits as its factorization.

25058521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29450.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 25058521 is about 5005.8486792951. The cubic root of 25058521 is about 292.6297512835.

It can be divided in two parts, 2505 and 8521, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 25058521 in words is "twenty-five million, fifty-eight thousand, five hundred twenty-one".