25161205 has 8 divisors (see below), whose sum is σ = 30226104. Its totient is φ = 20107200.

The previous prime is 25161163. The next prime is 25161209. The reversal of 25161205 is 50216152.

It can be written as a sum of positive squares in 4 ways, for example, as 14676561 + 10484644 = 3831^2 + 3238^2 .

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

It is not a de Polignac number, because 25161205 - 2¹⁵ = 25128437 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 (25161209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3775 + ... + 8035.

It is an arithmetic number, because the mean of its divisors is an integer number (3778263).

Almost surely, 2^25161205 is an apocalyptic number.

It is an amenable number.

25161205 is a deficient number, since it is larger than the sum of its proper divisors (5064899).

25161205 is a wasteful number, since it uses less digits than its factorization.

25161205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 25161205 is about 5016.0945963967. The cubic root of 25161205 is about 293.0289161396.

Adding to 25161205 its reverse (50216152), we get a palindrome (75377357).

It can be divided in two parts, 2516 and 1205, that added together give a square (3721 = 61²).

The spelling of 25161205 in words is "twenty-five million, one hundred sixty-one thousand, two hundred five".