25252321 has 16 divisors (see below), whose sum is σ = 27537408. Its totient is φ = 23086800.

The previous prime is 25252319. The next prime is 25252333. The reversal of 25252321 is 12325252.

It is a cyclic number.

It is not a de Polignac number, because 25252321 - 2¹ = 25252319 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25252292 and 25252301.

It is not an unprimeable number, because it can be changed into a prime (25252921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76126 + ... + 76456.

It is an arithmetic number, because the mean of its divisors is an integer number (1721088).

Almost surely, 2^25252321 is an apocalyptic number.

It is an amenable number.

25252321 is a deficient number, since it is larger than the sum of its proper divisors (2285087).

25252321 is a wasteful number, since it uses less digits than its factorization.

25252321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492.

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

The square root of 25252321 is about 5025.1687533853. The cubic root of 25252321 is about 293.3822041795.

Adding to 25252321 its reverse (12325252), we get a palindrome (37577573).

The spelling of 25252321 in words is "twenty-five million, two hundred fifty-two thousand, three hundred twenty-one".