102139072 has 28 divisors (see below), whose sum is σ = 231637840. Its totient is φ = 43773696.

The previous prime is 102139049. The next prime is 102139133. The reversal of 102139072 is 270931201.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113547 + ... + 114442.

It is an arithmetic number, because the mean of its divisors is an integer number (8272780).

Almost surely, 2^102139072 is an apocalyptic number.

It is an amenable number.

102139072 is an abundant number, since it is smaller than the sum of its proper divisors (129498768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102139072 is an equidigital number, since it uses as much as digits as its factorization.

102139072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228008 (or 227998 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 102139072 is about 10106.3876830448. The cubic root of 102139072 is about 467.4451261053.

The spelling of 102139072 in words is "one hundred two million, one hundred thirty-nine thousand, seventy-two".