142188081 has 8 divisors (see below), whose sum is σ = 216667584. Its totient is φ = 81250320.

The previous prime is 142188061. The next prime is 142188083. The reversal of 142188081 is 180881241.

142188081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 142188081 - 2⁵ = 142188049 is a prime.

It is a super-2 number, since 2×142188081² = 40434900756925122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142188083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3385410 + ... + 3385451.

It is an arithmetic number, because the mean of its divisors is an integer number (27083448).

Almost surely, 2^142188081 is an apocalyptic number.

It is an amenable number.

142188081 is a deficient number, since it is larger than the sum of its proper divisors (74479503).

142188081 is an equidigital number, since it uses as much as digits as its factorization.

142188081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770871.

The product of its (nonzero) digits is 4096, while the sum is 33.

The square root of 142188081 is about 11924.2643798265. The cubic root of 142188081 is about 521.9405805738.

The spelling of 142188081 in words is "one hundred forty-two million, one hundred eighty-eight thousand, eighty-one".