142498778 has 8 divisors (see below), whose sum is σ = 216454080. Its totient is φ = 70347420.

The previous prime is 142498771. The next prime is 142498781. The reversal of 142498778 is 877894241.

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 (142498771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450788 + ... + 451103.

It is an arithmetic number, because the mean of its divisors is an integer number (27056760).

Almost surely, 2^142498778 is an apocalyptic number.

142498778 is a deficient number, since it is larger than the sum of its proper divisors (73955302).

142498778 is an equidigital number, since it uses as much as digits as its factorization.

142498778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901972.

The product of its digits is 903168, while the sum is 50.

The square root of 142498778 is about 11937.2852022560. The cubic root of 142498778 is about 522.3204703602.

The spelling of 142498778 in words is "one hundred forty-two million, four hundred ninety-eight thousand, seven hundred seventy-eight".