142876309 has 2 divisors, whose sum is σ = 142876310. Its totient is φ = 142876308.

The previous prime is 142876291. The next prime is 142876337. The reversal of 142876309 is 903678241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73153809 + 69722500 = 8553^2 + 8350^2 .

It is a cyclic number.

It is not a de Polignac number, because 142876309 - 2¹⁵ = 142843541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142876339) 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 as a sum of consecutive naturals, namely, 71438154 + 71438155.

It is an arithmetic number, because the mean of its divisors is an integer number (71438155).

Almost surely, 2^142876309 is an apocalyptic number.

It is an amenable number.

142876309 is a deficient number, since it is larger than the sum of its proper divisors (1).

142876309 is an equidigital number, since it uses as much as digits as its factorization.

142876309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 142876309 is about 11953.0878437331. The cubic root of 142876309 is about 522.7813357880.

The spelling of 142876309 in words is "one hundred forty-two million, eight hundred seventy-six thousand, three hundred nine".