25249555 has 4 divisors (see below), whose sum is σ = 30299472. Its totient is φ = 20199640.

The previous prime is 25249541. The next prime is 25249559. The reversal of 25249555 is 55594252.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-25249555 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25249559) 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, 2524951 + ... + 2524960.

It is an arithmetic number, because the mean of its divisors is an integer number (7574868).

Almost surely, 2^25249555 is an apocalyptic number.

25249555 is a deficient number, since it is larger than the sum of its proper divisors (5049917).

25249555 is an equidigital number, since it uses as much as digits as its factorization.

25249555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049916.

The product of its digits is 90000, while the sum is 37.

The square root of 25249555 is about 5024.8935312104. The cubic root of 25249555 is about 293.3714919654.

The spelling of 25249555 in words is "twenty-five million, two hundred forty-nine thousand, five hundred fifty-five".