25249521 has 8 divisors (see below), whose sum is σ = 36726624. Its totient is φ = 15302720.

The previous prime is 25249519. The next prime is 25249541. The reversal of 25249521 is 12594252.

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 25249521 - 2¹ = 25249519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25249501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382536 + ... + 382601.

It is an arithmetic number, because the mean of its divisors is an integer number (4590828).

Almost surely, 2^25249521 is an apocalyptic number.

It is an amenable number.

25249521 is a deficient number, since it is larger than the sum of its proper divisors (11477103).

25249521 is a wasteful number, since it uses less digits than its factorization.

25249521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765151.

The product of its digits is 7200, while the sum is 30.

The square root of 25249521 is about 5024.8901480530. The cubic root of 25249521 is about 293.3713602847.

The spelling of 25249521 in words is "twenty-five million, two hundred forty-nine thousand, five hundred twenty-one".