25502506 has 4 divisors (see below), whose sum is σ = 38253762. Its totient is φ = 12751252.

The previous prime is 25502479. The next prime is 25502507. The reversal of 25502506 is 60520552.

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

It can be written as a sum of positive squares in only one way, i.e., 24098281 + 1404225 = 4909^2 + 1185^2 .

It is not an unprimeable number, because it can be changed into a prime (25502507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6375625 + ... + 6375628.

Almost surely, 2^25502506 is an apocalyptic number.

25502506 is a deficient number, since it is larger than the sum of its proper divisors (12751256).

25502506 is a wasteful number, since it uses less digits than its factorization.

25502506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12751255.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25502506 is about 5050.0005940594. Note that the first 3 decimals coincide. The cubic root of 25502506 is about 294.3479075113.

The spelling of 25502506 in words is "twenty-five million, five hundred two thousand, five hundred six".