102139510 has 32 divisors (see below), whose sum is σ = 201400992. Its totient is φ = 36986880.

The previous prime is 102139493. The next prime is 102139517. The reversal of 102139510 is 15931201.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102139517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26464 + ... + 30076.

It is an arithmetic number, because the mean of its divisors is an integer number (6293781).

Almost surely, 2^102139510 is an apocalyptic number.

102139510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102139510 is a deficient number, since it is larger than the sum of its proper divisors (99261482).

102139510 is a wasteful number, since it uses less digits than its factorization.

102139510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 102139510 is about 10106.4093524852. The cubic root of 102139510 is about 467.4457942814.

The spelling of 102139510 in words is "one hundred two million, one hundred thirty-nine thousand, five hundred ten".