102140 has 12 divisors (see below), whose sum is σ = 214536. Its totient is φ = 40848.

The previous prime is 102139. The next prime is 102149. The reversal of 102140 is 41201.

102140 = T₈₀ + T₈₁ + ... + T₁₀₃.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 102140.

It is not an unprimeable number, because it can be changed into a prime (102149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2534 + ... + 2573.

It is an arithmetic number, because the mean of its divisors is an integer number (17878).

2¹⁰²¹⁴⁰ is an apocalyptic number.

102140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102140 is an abundant number, since it is smaller than the sum of its proper divisors (112396).

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

102140 is a wasteful number, since it uses less digits than its factorization.

102140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116 (or 5114 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 102140 is about 319.5934917986. The cubic root of 102140 is about 46.7446541782.

Adding to 102140 its reverse (41201), we get a palindrome (143341).

It can be divided in two parts, 102 and 140, that added together give a palindrome (242).

The spelling of 102140 in words is "one hundred two thousand, one hundred forty", and thus it is an iban number.