12142154 has 4 divisors (see below), whose sum is σ = 18213234. Its totient is φ = 6071076.

The previous prime is 12142147. The next prime is 12142177. The reversal of 12142154 is 45124121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11458225 + 683929 = 3385^2 + 827^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3035537 + ... + 3035540.

Almost surely, 2^12142154 is an apocalyptic number.

12142154 is a deficient number, since it is larger than the sum of its proper divisors (6071080).

12142154 is an equidigital number, since it uses as much as digits as its factorization.

12142154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6071079.

The product of its digits is 320, while the sum is 20.

The square root of 12142154 is about 3484.5593695617. The cubic root of 12142154 is about 229.8433337635.

Adding to 12142154 its reverse (45124121), we get a palindrome (57266275).

The spelling of 12142154 in words is "twelve million, one hundred forty-two thousand, one hundred fifty-four".