25125447 has 4 divisors (see below), whose sum is σ = 33500600. Its totient is φ = 16750296.

The previous prime is 25125433. The next prime is 25125461. The reversal of 25125447 is 74452152.

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

It is an interprime number because it is at equal distance from previous prime (25125433) and next prime (25125461).

It is not a de Polignac number, because 25125447 - 2⁶ = 25125383 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 (25125427) 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, 4187572 + ... + 4187577.

It is an arithmetic number, because the mean of its divisors is an integer number (8375150).

Almost surely, 2^25125447 is an apocalyptic number.

25125447 is a deficient number, since it is larger than the sum of its proper divisors (8375153).

25125447 is an equidigital number, since it uses as much as digits as its factorization.

25125447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8375152.

The product of its digits is 11200, while the sum is 30.

The square root of 25125447 is about 5012.5290024099. The cubic root of 25125447 is about 292.8900370519.

Adding to 25125447 its reverse (74452152), we get a palindrome (99577599).

The spelling of 25125447 in words is "twenty-five million, one hundred twenty-five thousand, four hundred forty-seven".