142447218 has 32 divisors (see below), whose sum is σ = 306873600. Its totient is φ = 43935696.

The previous prime is 142447189. The next prime is 142447219. The reversal of 142447218 is 812744241.

142447218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (142447219) 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, 9628 + ... + 19431.

It is an arithmetic number, because the mean of its divisors is an integer number (9589800).

Almost surely, 2^142447218 is an apocalyptic number.

142447218 is an abundant number, since it is smaller than the sum of its proper divisors (164426382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142447218 is a wasteful number, since it uses less digits than its factorization.

142447218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29126.

The product of its digits is 14336, while the sum is 33.

The square root of 142447218 is about 11935.1253868571. The cubic root of 142447218 is about 522.2574660955.

The spelling of 142447218 in words is "one hundred forty-two million, four hundred forty-seven thousand, two hundred eighteen".