25247039 has 4 divisors (see below), whose sum is σ = 25280640. Its totient is φ = 25213440.

The previous prime is 25247017. The next prime is 25247041. The reversal of 25247039 is 93074252.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25247039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25246996 and 25247014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25247059) 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, 15647 + ... + 17184.

It is an arithmetic number, because the mean of its divisors is an integer number (6320160).

Almost surely, 2^25247039 is an apocalyptic number.

25247039 is a deficient number, since it is larger than the sum of its proper divisors (33601).

25247039 is an equidigital number, since it uses as much as digits as its factorization.

25247039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33600.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 25247039 is about 5024.6431714103. The cubic root of 25247039 is about 293.3617472763.

The spelling of 25247039 in words is "twenty-five million, two hundred forty-seven thousand, thirty-nine".