142499978 has 8 divisors (see below), whose sum is σ = 213801120. Its totient is φ = 71232940.

The previous prime is 142499977. The next prime is 142500023. The reversal of 142499978 is 879994241.

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

It is not an unprimeable number, because it can be changed into a prime (142499977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9803 + ... + 19521.

It is an arithmetic number, because the mean of its divisors is an integer number (26725140).

Almost surely, 2^142499978 is an apocalyptic number.

142499978 is a deficient number, since it is larger than the sum of its proper divisors (71301142).

142499978 is an equidigital number, since it uses as much as digits as its factorization.

142499978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17052.

The product of its digits is 1306368, while the sum is 53.

The square root of 142499978 is about 11937.3354648347. The cubic root of 142499978 is about 522.3219365314.

The spelling of 142499978 in words is "one hundred forty-two million, four hundred ninety-nine thousand, nine hundred seventy-eight".