102025439 has 2 divisors, whose sum is σ = 102025440. Its totient is φ = 102025438.

The previous prime is 102025423. The next prime is 102025481. The reversal of 102025439 is 934520201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102025439 - 2⁴ = 102025423 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 (102025139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51012719 + 51012720.

It is an arithmetic number, because the mean of its divisors is an integer number (51012720).

Almost surely, 2^102025439 is an apocalyptic number.

102025439 is a deficient number, since it is larger than the sum of its proper divisors (1).

102025439 is an equidigital number, since it uses as much as digits as its factorization.

102025439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 102025439 is about 10100.7642780138. The cubic root of 102025439 is about 467.2717125383.

The spelling of 102025439 in words is "one hundred two million, twenty-five thousand, four hundred thirty-nine".