102040 has 16 divisors (see below), whose sum is σ = 229680. Its totient is φ = 40800.

The previous prime is 102031. The next prime is 102043. The reversal of 102040 is 40201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102043) 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, 1236 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (14355).

2¹⁰²⁰⁴⁰ is an apocalyptic number.

102040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102040 is an abundant number, since it is smaller than the sum of its proper divisors (127640).

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

102040 is a wasteful number, since it uses less digits than its factorization.

102040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 102040 is about 319.4370047443. The cubic root of 102040 is about 46.7293941046.

Adding to 102040 its reverse (40201), we get a palindrome (142241).

The spelling of 102040 in words is "one hundred two thousand, forty", and thus it is an iban number.