12021874 has 4 divisors (see below), whose sum is σ = 18032814. Its totient is φ = 6010936.

The previous prime is 12021871. The next prime is 12021881. The reversal of 12021874 is 47812021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47812021 = 1129 ⋅42349.

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 2380849 = 3105^2 + 1543^2 .

It is not an unprimeable number, because it can be changed into a prime (12021871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005467 + ... + 3005470.

Almost surely, 2^12021874 is an apocalyptic number.

12021874 is a deficient number, since it is larger than the sum of its proper divisors (6010940).

12021874 is an equidigital number, since it uses as much as digits as its factorization.

12021874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010939.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12021874 is about 3467.2574176141. The cubic root of 12021874 is about 229.0818722910.

Adding to 12021874 its reverse (47812021), we get a palindrome (59833895).

The spelling of 12021874 in words is "twelve million, twenty-one thousand, eight hundred seventy-four".