142043969 has 2 divisors, whose sum is σ = 142043970. Its totient is φ = 142043968.

The previous prime is 142043927. The next prime is 142043971. The reversal of 142043969 is 969340241.

142043969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141895744 + 148225 = 11912^2 + 385^2 .

It is an emirp because it is prime and its reverse (969340241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142043969 - 2¹² = 142039873 is a prime.

It is a super-2 number, since 2×142043969² = 40352978258545922, which contains 22 as substring.

Together with 142043971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142043989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71021984 + 71021985.

It is an arithmetic number, because the mean of its divisors is an integer number (71021985).

Almost surely, 2^142043969 is an apocalyptic number.

It is an amenable number.

142043969 is a deficient number, since it is larger than the sum of its proper divisors (1).

142043969 is an equidigital number, since it uses as much as digits as its factorization.

142043969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 142043969 is about 11918.2200432783. The cubic root of 142043969 is about 521.7641866814.

The spelling of 142043969 in words is "one hundred forty-two million, forty-three thousand, nine hundred sixty-nine".