142193990 has 8 divisors (see below), whose sum is σ = 255949200. Its totient is φ = 56877592.

The previous prime is 142193983. The next prime is 142194011. The reversal of 142193990 is 99391241.

142193990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 7109690 + ... + 7109709.

It is an arithmetic number, because the mean of its divisors is an integer number (31993650).

Almost surely, 2^142193990 is an apocalyptic number.

142193990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142193990 is a deficient number, since it is larger than the sum of its proper divisors (113755210).

142193990 is a wasteful number, since it uses less digits than its factorization.

142193990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14219406.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 142193990 is about 11924.5121493502. The cubic root of 142193990 is about 521.9478106785.

The spelling of 142193990 in words is "one hundred forty-two million, one hundred ninety-three thousand, nine hundred ninety".