142974309 has 8 divisors (see below), whose sum is σ = 191802592. Its totient is φ = 94731120.

The previous prime is 142974289. The next prime is 142974311. The reversal of 142974309 is 903479241.

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

It is not a de Polignac number, because 142974309 - 2⁵ = 142974277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142974809) 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 7 ways as a sum of consecutive naturals, for example, 145702 + ... + 146679.

It is an arithmetic number, because the mean of its divisors is an integer number (23975324).

Almost surely, 2^142974309 is an apocalyptic number.

It is an amenable number.

142974309 is a deficient number, since it is larger than the sum of its proper divisors (48828283).

142974309 is a wasteful number, since it uses less digits than its factorization.

142974309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292547.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 142974309 is about 11957.1865001764. The cubic root of 142974309 is about 522.9008350997.

The spelling of 142974309 in words is "one hundred forty-two million, nine hundred seventy-four thousand, three hundred nine".