25800239 has 2 divisors, whose sum is σ = 25800240. Its totient is φ = 25800238.

The previous prime is 25800217. The next prime is 25800259. The reversal of 25800239 is 93200852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25800239 - 2¹² = 25796143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25800209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12900119 + 12900120.

It is an arithmetic number, because the mean of its divisors is an integer number (12900120).

Almost surely, 2^25800239 is an apocalyptic number.

25800239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25800239 is an equidigital number, since it uses as much as digits as its factorization.

25800239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 25800239 is about 5079.3935661652. The cubic root of 25800239 is about 295.4889487900.

It can be divided in two parts, 25 and 800239, that multiplied together give a triangular number (20005975 = T₆₃₂₅).

The spelling of 25800239 in words is "twenty-five million, eight hundred thousand, two hundred thirty-nine".