12144722 has 4 divisors (see below), whose sum is σ = 18217086. Its totient is φ = 6072360.

The previous prime is 12144709. The next prime is 12144739. The reversal of 12144722 is 22744121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22744121 = 19 ⋅1197059.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 4532641 = 2759^2 + 2129^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3036179 + ... + 3036182.

Almost surely, 2^12144722 is an apocalyptic number.

12144722 is a deficient number, since it is larger than the sum of its proper divisors (6072364).

12144722 is an equidigital number, since it uses as much as digits as its factorization.

12144722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6072363.

The product of its digits is 896, while the sum is 23.

The square root of 12144722 is about 3484.9278328252. The cubic root of 12144722 is about 229.8595361626.

Adding to 12144722 its reverse (22744121), we get a palindrome (34888843).

The spelling of 12144722 in words is "twelve million, one hundred forty-four thousand, seven hundred twenty-two".