102731140 has 24 divisors (see below), whose sum is σ = 217875672. Its totient is φ = 40684800.

The previous prime is 102731113. The next prime is 102731149. The reversal of 102731140 is 41137201.

It can be written as a sum of positive squares in 4 ways, for example, as 10916416 + 91814724 = 3304^2 + 9582^2 .

It is not an unprimeable number, because it can be changed into a prime (102731149) 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 7 ways as a sum of consecutive naturals, for example, 23409 + ... + 27448.

It is an arithmetic number, because the mean of its divisors is an integer number (9078153).

Almost surely, 2^102731140 is an apocalyptic number.

102731140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102731140 is an abundant number, since it is smaller than the sum of its proper divisors (115144532).

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

102731140 is a wasteful number, since it uses less digits than its factorization.

102731140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50967 (or 50965 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 102731140 is about 10135.6371284690. The cubic root of 102731140 is about 468.3465971711.

Adding to 102731140 its reverse (41137201), we get a palindrome (143868341).

The spelling of 102731140 in words is "one hundred two million, seven hundred thirty-one thousand, one hundred forty".