25561115 has 8 divisors (see below), whose sum is σ = 32477760. Its totient is φ = 19245952.

The previous prime is 25561079. The next prime is 25561139. The reversal of 25561115 is 51116552.

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 25561115 - 2⁶ = 25561051 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150275 + ... + 150444.

It is an arithmetic number, because the mean of its divisors is an integer number (4059720).

Almost surely, 2^25561115 is an apocalyptic number.

25561115 is a deficient number, since it is larger than the sum of its proper divisors (6916645).

25561115 is a wasteful number, since it uses less digits than its factorization.

25561115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300741.

The product of its digits is 1500, while the sum is 26.

The square root of 25561115 is about 5055.8001344990. The cubic root of 25561115 is about 294.5732218105.

Adding to 25561115 its reverse (51116552), we get a palindrome (76677667).

The spelling of 25561115 in words is "twenty-five million, five hundred sixty-one thousand, one hundred fifteen".