12442154 has 4 divisors (see below), whose sum is σ = 18663234. Its totient is φ = 6221076.

The previous prime is 12442153. The next prime is 12442159. The reversal of 12442154 is 45124421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45124421 = 373 ⋅120977.

It can be written as a sum of positive squares in only one way, i.e., 12411529 + 30625 = 3523^2 + 175^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12442151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110537 + ... + 3110540.

Almost surely, 2^12442154 is an apocalyptic number.

12442154 is a deficient number, since it is larger than the sum of its proper divisors (6221080).

12442154 is an equidigital number, since it uses as much as digits as its factorization.

12442154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221079.

The product of its digits is 1280, while the sum is 23.

The square root of 12442154 is about 3527.3437598283. The cubic root of 12442154 is about 231.7208915619.

Adding to 12442154 its reverse (45124421), we get a palindrome (57566575).

The spelling of 12442154 in words is "twelve million, four hundred forty-two thousand, one hundred fifty-four".