25172443 has 4 divisors (see below), whose sum is σ = 25585168. Its totient is φ = 24759720.

The previous prime is 25172437. The next prime is 25172449. The reversal of 25172443 is 34427152.

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 (25172437) and next prime (25172449).

It is a cyclic number.

It is not a de Polignac number, because 25172443 - 2¹⁷ = 25041371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25172449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206271 + ... + 206392.

It is an arithmetic number, because the mean of its divisors is an integer number (6396292).

Almost surely, 2^25172443 is an apocalyptic number.

25172443 is a deficient number, since it is larger than the sum of its proper divisors (412725).

25172443 is an equidigital number, since it uses as much as digits as its factorization.

25172443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412724.

The product of its digits is 6720, while the sum is 28.

The square root of 25172443 is about 5017.2146655291. The cubic root of 25172443 is about 293.0725357889.

Adding to 25172443 its reverse (34427152), we get a palindrome (59599595).

The spelling of 25172443 in words is "twenty-five million, one hundred seventy-two thousand, four hundred forty-three".