142188489 has 12 divisors (see below), whose sum is σ = 209753856. Its totient is φ = 92775192.

The previous prime is 142188481. The next prime is 142188503. The reversal of 142188489 is 984881241.

It is not a de Polignac number, because 142188489 - 2³ = 142188481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142188481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167649 + ... + 168494.

It is an arithmetic number, because the mean of its divisors is an integer number (17479488).

Almost surely, 2^142188489 is an apocalyptic number.

It is an amenable number.

142188489 is a deficient number, since it is larger than the sum of its proper divisors (67565367).

142188489 is a wasteful number, since it uses less digits than its factorization.

142188489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336196 (or 336193 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 142188489 is about 11924.2814877878. The cubic root of 142188489 is about 521.9410797988.

The spelling of 142188489 in words is "one hundred forty-two million, one hundred eighty-eight thousand, four hundred eighty-nine".