25155243 has 6 divisors (see below), whose sum is σ = 36335364. Its totient is φ = 16770156.

The previous prime is 25155239. The next prime is 25155287. The reversal of 25155243 is 34255152.

It is a happy number.

It is not a de Polignac number, because 25155243 - 2² = 25155239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25155203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1397505 + ... + 1397522.

It is an arithmetic number, because the mean of its divisors is an integer number (6055894).

Almost surely, 2^25155243 is an apocalyptic number.

25155243 is a deficient number, since it is larger than the sum of its proper divisors (11180121).

25155243 is a wasteful number, since it uses less digits than its factorization.

25155243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795033 (or 2795030 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 25155243 is about 5015.5002741501. The cubic root of 25155243 is about 293.0057697070.

Subtracting 25155243 from its reverse (34255152), we obtain a palindrome (9099909).

The spelling of 25155243 in words is "twenty-five million, one hundred fifty-five thousand, two hundred forty-three".