25204991 has 8 divisors (see below), whose sum is σ = 28836864. Its totient is φ = 21580920.

The previous prime is 25204979. The next prime is 25205023. The reversal of 25204991 is 19940252.

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 25204991 - 2¹⁰ = 25203967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25204901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9386 + ... + 11768.

It is an arithmetic number, because the mean of its divisors is an integer number (3604608).

Almost surely, 2^25204991 is an apocalyptic number.

25204991 is a deficient number, since it is larger than the sum of its proper divisors (3631873).

25204991 is a wasteful number, since it uses less digits than its factorization.

25204991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 25204991 is about 5020.4572500919. The cubic root of 25204991 is about 293.1987957704.

The spelling of 25204991 in words is "twenty-five million, two hundred four thousand, nine hundred ninety-one".