25072105 has 4 divisors (see below), whose sum is σ = 30086532. Its totient is φ = 20057680.

The previous prime is 25072063. The next prime is 25072111. The reversal of 25072105 is 50127052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16475481 + 8596624 = 4059^2 + 2932^2 .

It is not a de Polignac number, because 25072105 - 2⁹ = 25071593 is a prime.

It is a super-2 number, since 2×25072105² = 1257220898262050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian 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, 2507206 + ... + 2507215.

It is an arithmetic number, because the mean of its divisors is an integer number (7521633).

Almost surely, 2^25072105 is an apocalyptic number.

It is an amenable number.

25072105 is a deficient number, since it is larger than the sum of its proper divisors (5014427).

25072105 is an equidigital number, since it uses as much as digits as its factorization.

25072105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014426.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 25072105 is about 5007.2053083532. The cubic root of 25072105 is about 292.6826190548.

Adding to 25072105 its reverse (50127052), we get a palindrome (75199157).

The spelling of 25072105 in words is "twenty-five million, seventy-two thousand, one hundred five".