142394820 has 24 divisors (see below), whose sum is σ = 398705664. Its totient is φ = 37971936.

The previous prime is 142394753. The next prime is 142394849. The reversal of 142394820 is 28493241.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1186564 + ... + 1186683.

It is an arithmetic number, because the mean of its divisors is an integer number (16612736).

Almost surely, 2^142394820 is an apocalyptic number.

142394820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142394820 is an abundant number, since it is smaller than the sum of its proper divisors (256310844).

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

142394820 is a wasteful number, since it uses less digits than its factorization.

142394820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373259 (or 2373257 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 142394820 is about 11932.9300676741. The cubic root of 142394820 is about 522.1934222502.

The spelling of 142394820 in words is "one hundred forty-two million, three hundred ninety-four thousand, eight hundred twenty".