25825321 has 8 divisors (see below), whose sum is σ = 26100360. Its totient is φ = 25552128.

The previous prime is 25825309. The next prime is 25825333. The reversal of 25825321 is 12352852.

It is an interprime number because it is at equal distance from previous prime (25825309) and next prime (25825333).

It can be written as a sum of positive squares in 4 ways, for example, as 4995225 + 20830096 = 2235^2 + 4564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25825321 - 2¹⁹ = 25301033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25825321.

It is not an unprimeable number, because it can be changed into a prime (25825361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66195 + ... + 66583.

It is an arithmetic number, because the mean of its divisors is an integer number (3262545).

Almost surely, 2^25825321 is an apocalyptic number.

It is an amenable number.

25825321 is a deficient number, since it is larger than the sum of its proper divisors (275039).

25825321 is a wasteful number, since it uses less digits than its factorization.

25825321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its digits is 4800, while the sum is 28.

The square root of 25825321 is about 5081.8619619191. The cubic root of 25825321 is about 295.5846721074.

The spelling of 25825321 in words is "twenty-five million, eight hundred twenty-five thousand, three hundred twenty-one".