12140547 has 4 divisors (see below), whose sum is σ = 16187400. Its totient is φ = 8093696.

The previous prime is 12140543. The next prime is 12140549. The reversal of 12140547 is 74504121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74504121 = 3 ⋅24834707.

It is a cyclic number.

It is not a de Polignac number, because 12140547 - 2² = 12140543 is a prime.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2023422 + ... + 2023427.

It is an arithmetic number, because the mean of its divisors is an integer number (4046850).

Almost surely, 2^12140547 is an apocalyptic number.

12140547 is a deficient number, since it is larger than the sum of its proper divisors (4046853).

12140547 is an equidigital number, since it uses as much as digits as its factorization.

12140547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046852.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 12140547 is about 3484.3287732360. The cubic root of 12140547 is about 229.8331934833.

Adding to 12140547 its reverse (74504121), we get a palindrome (86644668).

The spelling of 12140547 in words is "twelve million, one hundred forty thousand, five hundred forty-seven".