25858321 has 2 divisors, whose sum is σ = 25858322. Its totient is φ = 25858320.

The previous prime is 25858307. The next prime is 25858337. The reversal of 25858321 is 12385852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 497025 = 5036^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 25858321 - 2¹¹ = 25856273 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (25858361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12929160 + 12929161.

It is an arithmetic number, because the mean of its divisors is an integer number (12929161).

Almost surely, 2^25858321 is an apocalyptic number.

It is an amenable number.

25858321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25858321 is an equidigital number, since it uses as much as digits as its factorization.

25858321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 34.

The square root of 25858321 is about 5085.1077668030. The cubic root of 25858321 is about 295.7105194285.

The spelling of 25858321 in words is "twenty-five million, eight hundred fifty-eight thousand, three hundred twenty-one".