142169978 has 8 divisors (see below), whose sum is σ = 214327200. Its totient is φ = 70727580.

The previous prime is 142169957. The next prime is 142169981. The reversal of 142169978 is 879961241.

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

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, 178208 + ... + 179003.

It is an arithmetic number, because the mean of its divisors is an integer number (26790900).

Almost surely, 2^142169978 is an apocalyptic number.

142169978 is a deficient number, since it is larger than the sum of its proper divisors (72157222).

142169978 is a wasteful number, since it uses less digits than its factorization.

142169978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357412.

The product of its digits is 217728, while the sum is 47.

The square root of 142169978 is about 11923.5052731988. The cubic root of 142169978 is about 521.9184289483.

The spelling of 142169978 in words is "one hundred forty-two million, one hundred sixty-nine thousand, nine hundred seventy-eight".