12143554 has 4 divisors (see below), whose sum is σ = 18215334. Its totient is φ = 6071776.

The previous prime is 12143513. The next prime is 12143561. The reversal of 12143554 is 45534121.

It is a happy number.

12143554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 11189025 + 954529 = 3345^2 + 977^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3035887 + ... + 3035890.

Almost surely, 2^12143554 is an apocalyptic number.

12143554 is a deficient number, since it is larger than the sum of its proper divisors (6071780).

12143554 is an equidigital number, since it uses as much as digits as its factorization.

12143554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071779.

The product of its digits is 2400, while the sum is 25.

The square root of 12143554 is about 3484.7602500029. The cubic root of 12143554 is about 229.8521671303.

Adding to 12143554 its reverse (45534121), we get a palindrome (57677675).

The spelling of 12143554 in words is "twelve million, one hundred forty-three thousand, five hundred fifty-four".