142556161 has 4 divisors (see below), whose sum is σ = 155515824. Its totient is φ = 129596500.

The previous prime is 142556159. The next prime is 142556173. The reversal of 142556161 is 161655241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 142556161 - 2¹ = 142556159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142556131) 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 in 3 ways as a sum of consecutive naturals, for example, 6479815 + ... + 6479836.

It is an arithmetic number, because the mean of its divisors is an integer number (38878956).

Almost surely, 2^142556161 is an apocalyptic number.

142556161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142556161 is a deficient number, since it is larger than the sum of its proper divisors (12959663).

142556161 is a wasteful number, since it uses less digits than its factorization.

142556161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12959662.

The product of its digits is 7200, while the sum is 31.

The square root of 142556161 is about 11939.6884800233. The cubic root of 142556161 is about 522.3905722322.

The spelling of 142556161 in words is "one hundred forty-two million, five hundred fifty-six thousand, one hundred sixty-one".