142126009 has 2 divisors, whose sum is σ = 142126010. Its totient is φ = 142126008.

The previous prime is 142125983. The next prime is 142126027. The reversal of 142126009 is 900621241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106090000 + 36036009 = 10300^2 + 6003^2 .

It is a cyclic number.

It is not a de Polignac number, because 142126009 - 2¹³ = 142117817 is a prime.

It is not a weakly prime, because it can be changed into another prime (142121009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71063004 + 71063005.

It is an arithmetic number, because the mean of its divisors is an integer number (71063005).

Almost surely, 2^142126009 is an apocalyptic number.

It is an amenable number.

142126009 is a deficient number, since it is larger than the sum of its proper divisors (1).

142126009 is an equidigital number, since it uses as much as digits as its factorization.

142126009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 142126009 is about 11921.6613355690. The cubic root of 142126009 is about 521.8646187185.

The spelling of 142126009 in words is "one hundred forty-two million, one hundred twenty-six thousand, nine".