142057830 has 32 divisors (see below), whose sum is σ = 341293824. Its totient is φ = 37842656.

The previous prime is 142057823. The next prime is 142057871. The reversal of 142057830 is 38750241.

142057830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37399 + ... + 41021.

It is an arithmetic number, because the mean of its divisors is an integer number (10665432).

Almost surely, 2^142057830 is an apocalyptic number.

142057830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142057830 is an abundant number, since it is smaller than the sum of its proper divisors (199235994).

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

142057830 is a wasteful number, since it uses less digits than its factorization.

142057830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 142057830 is about 11918.8015337113. The cubic root of 142057830 is about 521.7811578071.

The spelling of 142057830 in words is "one hundred forty-two million, fifty-seven thousand, eight hundred thirty".