25059521 has 4 divisors (see below), whose sum is σ = 25412544. Its totient is φ = 24706500.

The previous prime is 25059493. The next prime is 25059523. The reversal of 25059521 is 12595052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25059521 - 2²² = 20865217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25059523) 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, 176405 + ... + 176546.

It is an arithmetic number, because the mean of its divisors is an integer number (6353136).

Almost surely, 2^25059521 is an apocalyptic number.

It is an amenable number.

25059521 is a deficient number, since it is larger than the sum of its proper divisors (353023).

25059521 is an equidigital number, since it uses as much as digits as its factorization.

25059521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353022.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 25059521 is about 5005.9485614617. The cubic root of 25059521 is about 292.6336438498.

The spelling of 25059521 in words is "twenty-five million, fifty-nine thousand, five hundred twenty-one".