142341209 has 2 divisors, whose sum is σ = 142341210. Its totient is φ = 142341208.

The previous prime is 142341203. The next prime is 142341229. The reversal of 142341209 is 902143241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101445184 + 40896025 = 10072^2 + 6395^2 .

It is a cyclic number.

It is not a de Polignac number, because 142341209 - 2²⁰ = 141292633 is a prime.

It is a super-2 number, since 2×142341209² = 40522039559163362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142341203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71170604 + 71170605.

It is an arithmetic number, because the mean of its divisors is an integer number (71170605).

Almost surely, 2^142341209 is an apocalyptic number.

It is an amenable number.

142341209 is a deficient number, since it is larger than the sum of its proper divisors (1).

142341209 is an equidigital number, since it uses as much as digits as its factorization.

142341209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 142341209 is about 11930.6835093384. The cubic root of 142341209 is about 522.1278795438.

The spelling of 142341209 in words is "one hundred forty-two million, three hundred forty-one thousand, two hundred nine".