25172030 has 32 divisors (see below), whose sum is σ = 49067424. Its totient is φ = 9242496.

The previous prime is 25172027. The next prime is 25172039. The reversal of 25172030 is 3027152.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25171993 and 25172011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25172039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29084 + ... + 29936.

It is an arithmetic number, because the mean of its divisors is an integer number (1533357).

Almost surely, 2^25172030 is an apocalyptic number.

25172030 is a deficient number, since it is larger than the sum of its proper divisors (23895394).

25172030 is a wasteful number, since it uses less digits than its factorization.

25172030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 25172030 is about 5017.1735070655. The cubic root of 25172030 is about 293.0709329830.

Adding to 25172030 its reverse (3027152), we get a palindrome (28199182).

The spelling of 25172030 in words is "twenty-five million, one hundred seventy-two thousand, thirty".