25049521 has 8 divisors (see below), whose sum is σ = 29294144. Its totient is φ = 20971440.

The previous prime is 25049503. The next prime is 25049537. The reversal of 25049521 is 12594052.

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

It is not a de Polignac number, because 25049521 - 2⁵ = 25049489 is a prime.

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 25049521.

It is not an unprimeable number, because it can be changed into a prime (25049221) 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, 41310 + ... + 41911.

It is an arithmetic number, because the mean of its divisors is an integer number (3661768).

Almost surely, 2^25049521 is an apocalyptic number.

It is an amenable number.

25049521 is a deficient number, since it is larger than the sum of its proper divisors (4244623).

25049521 is an equidigital number, since it uses as much as digits as its factorization.

25049521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83271.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 25049521 is about 5004.9496500964. The cubic root of 25049521 is about 292.5947135263.

The spelling of 25049521 in words is "twenty-five million, forty-nine thousand, five hundred twenty-one".