25040605 has 4 divisors (see below), whose sum is σ = 30048732. Its totient is φ = 20032480.

The previous prime is 25040599. The next prime is 25040621. The reversal of 25040605 is 50604052.

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 15634116 + 9406489 = 3954^2 + 3067^2 .

It is not a de Polignac number, because 25040605 - 2⁵ = 25040573 is a prime.

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 a Duffinian number.

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, 2504056 + ... + 2504065.

It is an arithmetic number, because the mean of its divisors is an integer number (7512183).

Almost surely, 2^25040605 is an apocalyptic number.

It is an amenable number.

25040605 is a deficient number, since it is larger than the sum of its proper divisors (5008127).

25040605 is an equidigital number, since it uses as much as digits as its factorization.

25040605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5008126.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 25040605 is about 5004.0588525716. The cubic root of 25040605 is about 292.5599945118.

Adding to 25040605 its reverse (50604052), we get a palindrome (75644657).

The spelling of 25040605 in words is "twenty-five million, forty thousand, six hundred five".