25601249 has 4 divisors (see below), whose sum is σ = 25620480. Its totient is φ = 25582020.

The previous prime is 25601207. The next prime is 25601291. The reversal of 25601249 is 94210652.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (25601207) and next prime (25601291).

It is a cyclic number.

It is not a de Polignac number, because 25601249 - 2¹² = 25597153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25609249) 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 3 ways as a sum of consecutive naturals, for example, 7457 + ... + 10334.

It is an arithmetic number, because the mean of its divisors is an integer number (6405120).

Almost surely, 2^25601249 is an apocalyptic number.

It is an amenable number.

25601249 is a deficient number, since it is larger than the sum of its proper divisors (19231).

25601249 is a wasteful number, since it uses less digits than its factorization.

25601249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19230.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 25601249 is about 5059.7676824139. The cubic root of 25601249 is about 294.7273128918.

The spelling of 25601249 in words is "twenty-five million, six hundred one thousand, two hundred forty-nine".