102256439 has 2 divisors, whose sum is σ = 102256440. Its totient is φ = 102256438.

The previous prime is 102256433. The next prime is 102256447. The reversal of 102256439 is 934652201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102256439 - 2¹² = 102252343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102256433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51128219 + 51128220.

It is an arithmetic number, because the mean of its divisors is an integer number (51128220).

Almost surely, 2^102256439 is an apocalyptic number.

102256439 is a deficient number, since it is larger than the sum of its proper divisors (1).

102256439 is an equidigital number, since it uses as much as digits as its factorization.

102256439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 102256439 is about 10112.1925911248. The cubic root of 102256439 is about 467.6241030968.

The spelling of 102256439 in words is "one hundred two million, two hundred fifty-six thousand, four hundred thirty-nine".