25145251 has 4 divisors (see below), whose sum is σ = 25156600. Its totient is φ = 25133904.

The previous prime is 25145221. The next prime is 25145273. The reversal of 25145251 is 15254152.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25145251 - 2⁹ = 25144739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25145201) 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, 1146 + ... + 7183.

It is an arithmetic number, because the mean of its divisors is an integer number (6289150).

Almost surely, 2^25145251 is an apocalyptic number.

25145251 is a deficient number, since it is larger than the sum of its proper divisors (11349).

25145251 is an equidigital number, since it uses as much as digits as its factorization.

25145251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11348.

The product of its digits is 2000, while the sum is 25.

The square root of 25145251 is about 5014.5040632150. The cubic root of 25145251 is about 292.9669692950.

The spelling of 25145251 in words is "twenty-five million, one hundred forty-five thousand, two hundred fifty-one".