142978319 has 12 divisors (see below), whose sum is σ = 158307240. Its totient is φ = 129030000.

The previous prime is 142978307. The next prime is 142978321. The reversal of 142978319 is 913879241.

It is a de Polignac number, because none of the positive numbers 2^k-142978319 is a prime.

It is a super-2 number, since 2×142978319² = 40885599408131522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142978319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142978379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12569 + ... + 21069.

It is an arithmetic number, because the mean of its divisors is an integer number (13192270).

Almost surely, 2^142978319 is an apocalyptic number.

142978319 is a deficient number, since it is larger than the sum of its proper divisors (15328921).

142978319 is a wasteful number, since it uses less digits than its factorization.

142978319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662 (or 8651 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 142978319 is about 11957.3541805869. The cubic root of 142978319 is about 522.9057236533.

The spelling of 142978319 in words is "one hundred forty-two million, nine hundred seventy-eight thousand, three hundred nineteen".