142909128 has 24 divisors (see below), whose sum is σ = 387045750. Its totient is φ = 47636352.

The previous prime is 142909111. The next prime is 142909139. The reversal of 142909128 is 821909241.

142909128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 122279364 + 20629764 = 11058^2 + 4542^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 142909092 and 142909101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 992353 + ... + 992496.

Almost surely, 2^142909128 is an apocalyptic number.

142909128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

142909128 is an abundant number, since it is smaller than the sum of its proper divisors (244136622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142909128 is a wasteful number, since it uses less digits than its factorization.

142909128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984861 (or 1984854 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 142909128 is about 11954.4605900894. The cubic root of 142909128 is about 522.8213607281.

The spelling of 142909128 in words is "one hundred forty-two million, nine hundred nine thousand, one hundred twenty-eight".