142237161 has 16 divisors (see below), whose sum is σ = 229878720. Its totient is φ = 86204160.

The previous prime is 142237157. The next prime is 142237169. The reversal of 142237161 is 161732241.

It is not a de Polignac number, because 142237161 - 2² = 142237157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (142237169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239160 + ... + 239753.

It is an arithmetic number, because the mean of its divisors is an integer number (14367420).

Almost surely, 2^142237161 is an apocalyptic number.

142237161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142237161 is a deficient number, since it is larger than the sum of its proper divisors (87641559).

142237161 is a wasteful number, since it uses less digits than its factorization.

142237161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478933 (or 478927 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 142237161 is about 11926.3221908516. The cubic root of 142237161 is about 522.0006275590. Note that the first 3 decimals are identical.

It can be divided in two parts, 1422 and 37161, that added together give a palindrome (38583).

The spelling of 142237161 in words is "one hundred forty-two million, two hundred thirty-seven thousand, one hundred sixty-one".