102081138 has 8 divisors (see below), whose sum is σ = 204162288. Its totient is φ = 34027044.

The previous prime is 102081079. The next prime is 102081139. The reversal of 102081138 is 831180201.

It is a sphenic number, since it is the product of 3 distinct primes.

102081138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (102081139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8506756 + ... + 8506767.

It is an arithmetic number, because the mean of its divisors is an integer number (25520286).

Almost surely, 2^102081138 is an apocalyptic number.

102081138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

102081138 is a wasteful number, since it uses less digits than its factorization.

102081138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17013528.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 102081138 is about 10103.5210694094. The cubic root of 102081138 is about 467.3567300025.

The spelling of 102081138 in words is "one hundred two million, eighty-one thousand, one hundred thirty-eight".