142351009 has 2 divisors, whose sum is σ = 142351010. Its totient is φ = 142351008.

The previous prime is 142351007. The next prime is 142351031. The reversal of 142351009 is 900153241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141134400 + 1216609 = 11880^2 + 1103^2 .

It is a cyclic number.

It is not a de Polignac number, because 142351009 - 2¹ = 142351007 is a prime.

Together with 142351007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142351007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71175504 + 71175505.

It is an arithmetic number, because the mean of its divisors is an integer number (71175505).

Almost surely, 2^142351009 is an apocalyptic number.

It is an amenable number.

142351009 is a deficient number, since it is larger than the sum of its proper divisors (1).

142351009 is an equidigital number, since it uses as much as digits as its factorization.

142351009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 142351009 is about 11931.0942079928. The cubic root of 142351009 is about 522.1398618686.

The spelling of 142351009 in words is "one hundred forty-two million, three hundred fifty-one thousand, nine".