4142309 has 2 divisors, whose sum is σ = 4142310. Its totient is φ = 4142308.

The previous prime is 4142297. The next prime is 4142311. The reversal of 4142309 is 9032414.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3648100 + 494209 = 1910^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 4142309 - 2⁴ = 4142293 is a prime.

Together with 4142311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4142609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071154 + 2071155.

It is an arithmetic number, because the mean of its divisors is an integer number (2071155).

Almost surely, 2^4142309 is an apocalyptic number.

It is an amenable number.

4142309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4142309 is an equidigital number, since it uses as much as digits as its factorization.

4142309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 4142309 is about 2035.2663216395. The cubic root of 4142309 is about 160.6007235185.

The spelling of 4142309 in words is "four million, one hundred forty-two thousand, three hundred nine".