142211889 has 16 divisors (see below), whose sum is σ = 214257600. Its totient is φ = 93199968.

The previous prime is 142211869. The next prime is 142211893. The reversal of 142211889 is 988112241.

It is a happy number.

It is not a de Polignac number, because 142211889 - 2⁷ = 142211761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142211809) 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, 43044 + ... + 46229.

It is an arithmetic number, because the mean of its divisors is an integer number (13391100).

Almost surely, 2^142211889 is an apocalyptic number.

It is an amenable number.

142211889 is a deficient number, since it is larger than the sum of its proper divisors (72045711).

142211889 is an equidigital number, since it uses as much as digits as its factorization.

142211889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89341 (or 89335 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 142211889 is about 11925.2626386172. The cubic root of 142211889 is about 521.9697102255.

It can be divided in two parts, 14221 and 1889, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 142211889 in words is "one hundred forty-two million, two hundred eleven thousand, eight hundred eighty-nine".