142236161 has 8 divisors (see below), whose sum is σ = 151092864. Its totient is φ = 133433920.

The previous prime is 142236137. The next prime is 142236169. The reversal of 142236161 is 161632241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142236161 is a prime.

It is a super-2 number, since 2×142236161² = 40462250992035842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142236161.

It is not an unprimeable number, because it can be changed into a prime (142236169) 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, 8165 + ... + 18738.

It is an arithmetic number, because the mean of its divisors is an integer number (18886608).

Almost surely, 2^142236161 is an apocalyptic number.

It is an amenable number.

142236161 is a deficient number, since it is larger than the sum of its proper divisors (8856703).

142236161 is a wasteful number, since it uses less digits than its factorization.

142236161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27231.

The product of its digits is 1728, while the sum is 26.

The square root of 142236161 is about 11926.2802667051. The cubic root of 142236161 is about 521.9994042457. Note that the first 3 decimals are identical.

The spelling of 142236161 in words is "one hundred forty-two million, two hundred thirty-six thousand, one hundred sixty-one".