12143642 has 16 divisors (see below), whose sum is σ = 20866560. Its totient is φ = 5192208.

The previous prime is 12143639. The next prime is 12143687. The reversal of 12143642 is 24634121.

12143642 is a modest number, since divided by 3642 gives 1214 as remainder.

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 in 7 ways as a sum of consecutive naturals, for example, 7784 + ... + 9212.

It is an arithmetic number, because the mean of its divisors is an integer number (1304160).

Almost surely, 2^12143642 is an apocalyptic number.

12143642 is a deficient number, since it is larger than the sum of its proper divisors (8722918).

12143642 is a wasteful number, since it uses less digits than its factorization.

12143642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045.

The product of its digits is 1152, while the sum is 23.

The square root of 12143642 is about 3484.7728763866. The cubic root of 12143642 is about 229.8527223479.

Adding to 12143642 its reverse (24634121), we get a palindrome (36777763).

The spelling of 12143642 in words is "twelve million, one hundred forty-three thousand, six hundred forty-two".