142145089 has 4 divisors (see below), whose sum is σ = 144092356. Its totient is φ = 140197824.

The previous prime is 142145071. The next prime is 142145111. The reversal of 142145089 is 980541241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980541241 = 4643 ⋅211187.

It can be written as a sum of positive squares in 2 ways, for example, as 40538689 + 101606400 = 6367^2 + 10080^2 .

It is a cyclic number.

It is not a de Polignac number, because 142145089 - 2¹⁷ = 142014017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142145389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973524 + ... + 973669.

It is an arithmetic number, because the mean of its divisors is an integer number (36023089).

Almost surely, 2^142145089 is an apocalyptic number.

It is an amenable number.

142145089 is a deficient number, since it is larger than the sum of its proper divisors (1947267).

142145089 is an equidigital number, since it uses as much as digits as its factorization.

142145089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947266.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 142145089 is about 11922.4615327540. The cubic root of 142145089 is about 521.8879706052.

The spelling of 142145089 in words is "one hundred forty-two million, one hundred forty-five thousand, eighty-nine".