102139250 has 32 divisors (see below), whose sum is σ = 201277440. Its totient is φ = 38703600.

The previous prime is 102139243. The next prime is 102139273. The reversal of 102139250 is 52931201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6002 + ... + 15501.

It is an arithmetic number, because the mean of its divisors is an integer number (6289920).

Almost surely, 2^102139250 is an apocalyptic number.

102139250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102139250 is a deficient number, since it is larger than the sum of its proper divisors (99138190).

102139250 is a wasteful number, since it uses less digits than its factorization.

102139250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21539 (or 21529 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 102139250 is about 10106.3964893527. The cubic root of 102139250 is about 467.4453976474.

The spelling of 102139250 in words is "one hundred two million, one hundred thirty-nine thousand, two hundred fifty".