25090641 has 20 divisors (see below), whose sum is σ = 37738932. Its totient is φ = 16612128.

The previous prime is 25090627. The next prime is 25090669. The reversal of 25090641 is 14609052.

It can be written as a sum of positive squares in 2 ways, for example, as 6350400 + 18740241 = 2520^2 + 4329^2 .

It is not a de Polignac number, because 25090641 - 2⁶ = 25090577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25090841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11731 + ... + 13703.

Almost surely, 2^25090641 is an apocalyptic number.

It is an amenable number.

25090641 is a deficient number, since it is larger than the sum of its proper divisors (12648291).

25090641 is a wasteful number, since it uses less digits than its factorization.

25090641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142 (or 2133 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 25090641 is about 5009.0558990692. The cubic root of 25090641 is about 292.7547287909.

Adding to 25090641 its reverse (14609052), we get a palindrome (39699693).

The spelling of 25090641 in words is "twenty-five million, ninety thousand, six hundred forty-one".