102040939 has 16 divisors (see below), whose sum is σ = 137007360. Its totient is φ = 73395360.

The previous prime is 102040927. The next prime is 102040943. The reversal of 102040939 is 939040201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102040939 - 2⁵ = 102040907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102040979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49969 + ... + 51970.

It is an arithmetic number, because the mean of its divisors is an integer number (8562960).

Almost surely, 2^102040939 is an apocalyptic number.

102040939 is a deficient number, since it is larger than the sum of its proper divisors (34966421).

102040939 is a wasteful number, since it uses less digits than its factorization.

102040939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101970.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 102040939 is about 10101.5315175472. The cubic root of 102040939 is about 467.2953744305.

The spelling of 102040939 in words is "one hundred two million, forty thousand, nine hundred thirty-nine".