142454309 has 2 divisors, whose sum is σ = 142454310. Its totient is φ = 142454308.

The previous prime is 142454251. The next prime is 142454363. The reversal of 142454309 is 903454241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114597025 + 27857284 = 10705^2 + 5278^2 .

It is an emirp because it is prime and its reverse (903454241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142454309 - 2¹² = 142450213 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142454909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71227154 + 71227155.

It is an arithmetic number, because the mean of its divisors is an integer number (71227155).

Almost surely, 2^142454309 is an apocalyptic number.

It is an amenable number.

142454309 is a deficient number, since it is larger than the sum of its proper divisors (1).

142454309 is an equidigital number, since it uses as much as digits as its factorization.

142454309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 142454309 is about 11935.4224474880. The cubic root of 142454309 is about 522.2661319164.

The spelling of 142454309 in words is "one hundred forty-two million, four hundred fifty-four thousand, three hundred nine".