142161286 has 4 divisors (see below), whose sum is σ = 213241932. Its totient is φ = 71080642.

The previous prime is 142161281. The next prime is 142161301. The reversal of 142161286 is 682161241.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142161281) 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 as a sum of consecutive naturals, namely, 35540320 + ... + 35540323.

It is an arithmetic number, because the mean of its divisors is an integer number (53310483).

Almost surely, 2^142161286 is an apocalyptic number.

142161286 is a deficient number, since it is larger than the sum of its proper divisors (71080646).

142161286 is an equidigital number, since it uses as much as digits as its factorization.

142161286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71080645.

The product of its digits is 4608, while the sum is 31.

The square root of 142161286 is about 11923.1407774965. The cubic root of 142161286 is about 521.9077923673.

The spelling of 142161286 in words is "one hundred forty-two million, one hundred sixty-one thousand, two hundred eighty-six".