25403321 has 4 divisors (see below), whose sum is σ = 26897652. Its totient is φ = 23908992.

The previous prime is 25403317. The next prime is 25403327. The reversal of 25403321 is 12330452.

It is a happy number.

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 20611600 + 4791721 = 4540^2 + 2189^2 .

It is a cyclic number.

It is not a de Polignac number, because 25403321 - 2² = 25403317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25403293 and 25403302.

It is not an unprimeable number, because it can be changed into a prime (25403327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747140 + ... + 747173.

It is an arithmetic number, because the mean of its divisors is an integer number (6724413).

Almost surely, 2^25403321 is an apocalyptic number.

It is an amenable number.

25403321 is a deficient number, since it is larger than the sum of its proper divisors (1494331).

25403321 is a wasteful number, since it uses less digits than its factorization.

25403321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494330.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 25403321 is about 5040.1707312352. The cubic root of 25403321 is about 293.9658165942.

Adding to 25403321 its reverse (12330452), we get a palindrome (37733773).

The spelling of 25403321 in words is "twenty-five million, four hundred three thousand, three hundred twenty-one".