25172534 has 8 divisors (see below), whose sum is σ = 39400560. Its totient is φ = 12039016.

The previous prime is 25172491. The next prime is 25172561. The reversal of 25172534 is 43527152.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25172497 and 25172506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273569 + ... + 273660.

It is an arithmetic number, because the mean of its divisors is an integer number (4925070).

Almost surely, 2^25172534 is an apocalyptic number.

25172534 is a deficient number, since it is larger than the sum of its proper divisors (14228026).

25172534 is a wasteful number, since it uses less digits than its factorization.

25172534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547254.

The product of its digits is 8400, while the sum is 29.

The square root of 25172534 is about 5017.2237342977. The cubic root of 25172534 is about 293.0728889471.

Adding to 25172534 its reverse (43527152), we get a palindrome (68699686).

The spelling of 25172534 in words is "twenty-five million, one hundred seventy-two thousand, five hundred thirty-four".