102012939 has 20 divisors (see below), whose sum is σ = 174160624. Its totient is φ = 58292784.

The previous prime is 102012913. The next prime is 102012949. The reversal of 102012939 is 939210201.

It is not a de Polignac number, because 102012939 - 2⁵ = 102012907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102012949) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 89392 + ... + 90525.

Almost surely, 2^102012939 is an apocalyptic number.

102012939 is a deficient number, since it is larger than the sum of its proper divisors (72147685).

102012939 is an equidigital number, since it uses as much as digits as its factorization.

102012939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179936 (or 179927 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 102012939 is about 10100.1454940016. The cubic root of 102012939 is about 467.2526286216.

The spelling of 102012939 in words is "one hundred two million, twelve thousand, nine hundred thirty-nine".