12140540 has 24 divisors (see below), whose sum is σ = 25561872. Its totient is φ = 4843520.

The previous prime is 12140539. The next prime is 12140543. The reversal of 12140540 is 4504121.

It is a super-2 number, since 2×12140540² = 294785422983200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12140543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12347 + ... + 13293.

It is an arithmetic number, because the mean of its divisors is an integer number (1065078).

Almost surely, 2^12140540 is an apocalyptic number.

12140540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12140540 is an abundant number, since it is smaller than the sum of its proper divisors (13421332).

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

12140540 is a wasteful number, since it uses less digits than its factorization.

12140540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597 (or 1595 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12140540 is about 3484.3277687382. The cubic root of 12140540 is about 229.8331493108.

Adding to 12140540 its reverse (4504121), we get a palindrome (16644661).

The spelling of 12140540 in words is "twelve million, one hundred forty thousand, five hundred forty".