142091668 has 12 divisors (see below), whose sum is σ = 248929632. Its totient is φ = 70968920.

The previous prime is 142091641. The next prime is 142091681. The reversal of 142091668 is 866190241.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 14968 + ... + 22543.

It is an arithmetic number, because the mean of its divisors is an integer number (20744136).

Almost surely, 2^142091668 is an apocalyptic number.

It is an amenable number.

142091668 is a deficient number, since it is larger than the sum of its proper divisors (106837964).

142091668 is a wasteful number, since it uses less digits than its factorization.

142091668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38462 (or 38460 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 142091668 is about 11920.2209711062. The cubic root of 142091668 is about 521.8225837276.

The spelling of 142091668 in words is "one hundred forty-two million, ninety-one thousand, six hundred sixty-eight".