142305769 has 2 divisors, whose sum is σ = 142305770. Its totient is φ = 142305768.

The previous prime is 142305767. The next prime is 142305799. The reversal of 142305769 is 967503241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113145769 + 29160000 = 10637^2 + 5400^2 .

It is a cyclic number.

It is not a de Polignac number, because 142305769 - 2¹ = 142305767 is a prime.

It is a super-2 number, since 2×142305769² = 40501863781362722, which contains 22 as substring.

Together with 142305767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142305767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71152884 + 71152885.

It is an arithmetic number, because the mean of its divisors is an integer number (71152885).

Almost surely, 2^142305769 is an apocalyptic number.

It is an amenable number.

142305769 is a deficient number, since it is larger than the sum of its proper divisors (1).

142305769 is an equidigital number, since it uses as much as digits as its factorization.

142305769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 142305769 is about 11929.1981708747. The cubic root of 142305769 is about 522.0845429535.

The spelling of 142305769 in words is "one hundred forty-two million, three hundred five thousand, seven hundred sixty-nine".