12400140 has 48 divisors (see below), whose sum is σ = 36765792. Its totient is φ = 3111936.

The previous prime is 12400127. The next prime is 12400169. The reversal of 12400140 is 4100421.

12400140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5059 + ... + 7098.

It is an arithmetic number, because the mean of its divisors is an integer number (765954).

Almost surely, 2^12400140 is an apocalyptic number.

12400140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400140 is an abundant number, since it is smaller than the sum of its proper divisors (24365652).

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

12400140 is a wasteful number, since it uses less digits than its factorization.

12400140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12186 (or 12184 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 12400140 is about 3521.3832509399. The cubic root of 12400140 is about 231.4597765312.

Adding to 12400140 its reverse (4100421), we get a palindrome (16500561).

The spelling of 12400140 in words is "twelve million, four hundred thousand, one hundred forty".