142271899 has 8 divisors (see below), whose sum is σ = 177378048. Its totient is φ = 110861160.

The previous prime is 142271879. The next prime is 142271903. The reversal of 142271899 is 998172241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 142271899 - 2¹⁷ = 142140827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142271849) 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, 923767 + ... + 923920.

It is an arithmetic number, because the mean of its divisors is an integer number (22172256).

Almost surely, 2^142271899 is an apocalyptic number.

142271899 is a deficient number, since it is larger than the sum of its proper divisors (35106149).

142271899 is a wasteful number, since it uses less digits than its factorization.

142271899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847705.

The product of its digits is 72576, while the sum is 43.

The square root of 142271899 is about 11927.7784603840. The cubic root of 142271899 is about 522.0431194593.

The spelling of 142271899 in words is "one hundred forty-two million, two hundred seventy-one thousand, eight hundred ninety-nine".