142267978 has 4 divisors (see below), whose sum is σ = 213401970. Its totient is φ = 71133988.

The previous prime is 142267973. The next prime is 142267981. The reversal of 142267978 is 879762241.

142267978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 112423609 + 29844369 = 10603^2 + 5463^2 .

It is not an unprimeable number, because it can be changed into a prime (142267973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35566993 + ... + 35566996.

Almost surely, 2^142267978 is an apocalyptic number.

142267978 is a deficient number, since it is larger than the sum of its proper divisors (71133992).

142267978 is an equidigital number, since it uses as much as digits as its factorization.

142267978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71133991.

The product of its digits is 338688, while the sum is 46.

The square root of 142267978 is about 11927.6140950317. The cubic root of 142267978 is about 522.0383235957.

The spelling of 142267978 in words is "one hundred forty-two million, two hundred sixty-seven thousand, nine hundred seventy-eight".