12154442 has 16 divisors (see below), whose sum is σ = 19179072. Its totient is φ = 5765760.

The previous prime is 12154399. The next prime is 12154447. The reversal of 12154442 is 24445121.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (12154447) 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 in 7 ways as a sum of consecutive naturals, for example, 5018 + ... + 7034.

It is an arithmetic number, because the mean of its divisors is an integer number (1198692).

Almost surely, 2^12154442 is an apocalyptic number.

12154442 is a deficient number, since it is larger than the sum of its proper divisors (7024630).

12154442 is a wasteful number, since it uses less digits than its factorization.

12154442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173.

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

The square root of 12154442 is about 3486.3221308422. The cubic root of 12154442 is about 229.9208423251.

Adding to 12154442 its reverse (24445121), we get a palindrome (36599563).

The spelling of 12154442 in words is "twelve million, one hundred fifty-four thousand, four hundred forty-two".