142285391 has 2 divisors, whose sum is σ = 142285392. Its totient is φ = 142285390.

The previous prime is 142285379. The next prime is 142285441. The reversal of 142285391 is 193582241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142285391 - 2⁶ = 142285327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142285331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71142695 + 71142696.

It is an arithmetic number, because the mean of its divisors is an integer number (71142696).

Almost surely, 2^142285391 is an apocalyptic number.

142285391 is a deficient number, since it is larger than the sum of its proper divisors (1).

142285391 is an equidigital number, since it uses as much as digits as its factorization.

142285391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 142285391 is about 11928.3440175072. The cubic root of 142285391 is about 522.0596211559.

The spelling of 142285391 in words is "one hundred forty-two million, two hundred eighty-five thousand, three hundred ninety-one".