142279313 has 4 divisors (see below), whose sum is σ = 155213808. Its totient is φ = 129344820.

The previous prime is 142279301. The next prime is 142279321. The reversal of 142279313 is 313972241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-142279313 is a prime.

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 142279313.

It is not an unprimeable number, because it can be changed into a prime (142279343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6467231 + ... + 6467252.

It is an arithmetic number, because the mean of its divisors is an integer number (38803452).

Almost surely, 2^142279313 is an apocalyptic number.

It is an amenable number.

142279313 is a deficient number, since it is larger than the sum of its proper divisors (12934495).

142279313 is a wasteful number, since it uses less digits than its factorization.

142279313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12934494.

The product of its digits is 9072, while the sum is 32.

The square root of 142279313 is about 11928.0892434623. The cubic root of 142279313 is about 522.0521874493.

The spelling of 142279313 in words is "one hundred forty-two million, two hundred seventy-nine thousand, three hundred thirteen".