102543140 has 48 divisors (see below), whose sum is σ = 246758400. Its totient is φ = 35064192.

The previous prime is 102543113. The next prime is 102543149. The reversal of 102543140 is 41345201.

It is a super-3 number, since 3×102543140³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (102543149) 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, 70541 + ... + 71979.

It is an arithmetic number, because the mean of its divisors is an integer number (5140800).

Almost surely, 2^102543140 is an apocalyptic number.

102543140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102543140 is an abundant number, since it is smaller than the sum of its proper divisors (144215260).

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

102543140 is a wasteful number, since it uses less digits than its factorization.

102543140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964 (or 1962 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 102543140 is about 10126.3586742718. The cubic root of 102543140 is about 468.0607282336.

Adding to 102543140 its reverse (41345201), we get a palindrome (143888341).

The spelling of 102543140 in words is "one hundred two million, five hundred forty-three thousand, one hundred forty".