12140542 has 4 divisors (see below), whose sum is σ = 18210816. Its totient is φ = 6070270.

The previous prime is 12140539. The next prime is 12140543. The reversal of 12140542 is 24504121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24504121 = 283 ⋅86587.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 3035134 + ... + 3035137.

It is an arithmetic number, because the mean of its divisors is an integer number (4552704).

Almost surely, 2^12140542 is an apocalyptic number.

12140542 is a deficient number, since it is larger than the sum of its proper divisors (6070274).

12140542 is an equidigital number, since it uses as much as digits as its factorization.

12140542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6070273.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 12140542 is about 3484.3280557376. The cubic root of 12140542 is about 229.8331619315.

Adding to 12140542 its reverse (24504121), we get a palindrome (36644663).

The spelling of 12140542 in words is "twelve million, one hundred forty thousand, five hundred forty-two".