142189989 has 16 divisors (see below), whose sum is σ = 201116160. Its totient is φ = 89049600.

The previous prime is 142189981. The next prime is 142189997. The reversal of 142189989 is 989981241.

142189989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (142189981) and next prime (142189997).

It is not a de Polignac number, because 142189989 - 2³ = 142189981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142189981) 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, 28332 + ... + 32970.

It is an arithmetic number, because the mean of its divisors is an integer number (12569760).

Almost surely, 2^142189989 is an apocalyptic number.

It is an amenable number.

142189989 is a deficient number, since it is larger than the sum of its proper divisors (58926171).

142189989 is a wasteful number, since it uses less digits than its factorization.

142189989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260.

The product of its digits is 373248, while the sum is 51.

The square root of 142189989 is about 11924.3443844934. The cubic root of 142189989 is about 521.9429151768.

The spelling of 142189989 in words is "one hundred forty-two million, one hundred eighty-nine thousand, nine hundred eighty-nine".