12140040 has 128 divisors (see below), whose sum is σ = 42145920. Its totient is φ = 2764800.

The previous prime is 12140039. The next prime is 12140047. The reversal of 12140040 is 4004121.

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

It is a junction number, because it is equal to n+sod(n) for n = 12139998 and 12140025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12140047) 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 31 ways as a sum of consecutive naturals, for example, 22170 + ... + 22710.

It is an arithmetic number, because the mean of its divisors is an integer number (329265).

Almost surely, 2^12140040 is an apocalyptic number.

12140040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12140040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21072960).

12140040 is an abundant number, since it is smaller than the sum of its proper divisors (30005880).

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

12140040 is a wasteful number, since it uses less digits than its factorization.

12140040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 579 counting only the distinct ones).

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

The square root of 12140040 is about 3484.2560181479. The cubic root of 12140040 is about 229.8299940928.

Adding to 12140040 its reverse (4004121), we get a palindrome (16144161).

The spelling of 12140040 in words is "twelve million, one hundred forty thousand, forty".