25172607 has 4 divisors (see below), whose sum is σ = 33563480. Its totient is φ = 16781736.

The previous prime is 25172599. The next prime is 25172611. The reversal of 25172607 is 70627152.

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

It is not a de Polignac number, because 25172607 - 2³ = 25172599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25172627) 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, 4195432 + ... + 4195437.

It is an arithmetic number, because the mean of its divisors is an integer number (8390870).

Almost surely, 2^25172607 is an apocalyptic number.

25172607 is a deficient number, since it is larger than the sum of its proper divisors (8390873).

25172607 is an equidigital number, since it uses as much as digits as its factorization.

25172607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8390872.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 25172607 is about 5017.2310092321. The cubic root of 25172607 is about 293.0731722493.

Adding to 25172607 its reverse (70627152), we get a palindrome (95799759).

The spelling of 25172607 in words is "twenty-five million, one hundred seventy-two thousand, six hundred seven".