25921953 has 12 divisors (see below), whose sum is σ = 37814868. Its totient is φ = 17109600.

The previous prime is 25921919. The next prime is 25921967. The reversal of 25921953 is 35912952.

It is a happy number.

25921953 is a `hidden beast` number, since 2 + 592 + 19 + 53 = 666.

25921953 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in 2 ways, for example, as 23882769 + 2039184 = 4887^2 + 1428^2 .

It is not a de Polignac number, because 25921953 - 2¹³ = 25913761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25921913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13350 + ... + 15167.

It is an arithmetic number, because the mean of its divisors is an integer number (3151239).

Almost surely, 2^25921953 is an apocalyptic number.

It is an amenable number.

25921953 is a deficient number, since it is larger than the sum of its proper divisors (11892915).

25921953 is a wasteful number, since it uses less digits than its factorization.

25921953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28624 (or 28621 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 25921953 is about 5091.3606236447. The cubic root of 25921953 is about 295.9528816222.

Subtracting 25921953 from its reverse (35912952), we obtain a palindrome (9990999).

The spelling of 25921953 in words is "twenty-five million, nine hundred twenty-one thousand, nine hundred fifty-three".