143991142 has 16 divisors (see below), whose sum is σ = 222549120. Its totient is φ = 69838912.

The previous prime is 143991131. The next prime is 143991143. The reversal of 143991142 is 241199341.

It is a junction number, because it is equal to n+sod(n) for n = 143991098 and 143991107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143991143) by changing a digit.

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, 1803 + ... + 17065.

It is an arithmetic number, because the mean of its divisors is an integer number (13909320).

Almost surely, 2^143991142 is an apocalyptic number.

143991142 is a deficient number, since it is larger than the sum of its proper divisors (78557978).

143991142 is a wasteful number, since it uses less digits than its factorization.

143991142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15407.

The product of its digits is 7776, while the sum is 34.

The square root of 143991142 is about 11999.6309109906. The cubic root of 143991142 is about 524.1375311551.

The spelling of 143991142 in words is "one hundred forty-three million, nine hundred ninety-one thousand, one hundred forty-two".