142404389 has 2 divisors, whose sum is σ = 142404390. Its totient is φ = 142404388.

The previous prime is 142404371. The next prime is 142404403. The reversal of 142404389 is 983404241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 2455489 = 11830^2 + 1567^2 .

It is a cyclic number.

It is not a de Polignac number, because 142404389 - 2⁸ = 142404133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142404329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71202194 + 71202195.

It is an arithmetic number, because the mean of its divisors is an integer number (71202195).

Almost surely, 2^142404389 is an apocalyptic number.

It is an amenable number.

142404389 is a deficient number, since it is larger than the sum of its proper divisors (1).

142404389 is an equidigital number, since it uses as much as digits as its factorization.

142404389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 142404389 is about 11933.3310102419. The cubic root of 142404389 is about 522.2051192041.

The spelling of 142404389 in words is "one hundred forty-two million, four hundred four thousand, three hundred eighty-nine".