142856387 has 2 divisors, whose sum is σ = 142856388. Its totient is φ = 142856386.

The previous prime is 142856377. The next prime is 142856431. The reversal of 142856387 is 783658241.

It is an a-pointer prime, because the next prime (142856431) can be obtained adding 142856387 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142856387 - 2²⁴ = 126079171 is a prime.

It is not a weakly prime, because it can be changed into another prime (142856347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71428193 + 71428194.

It is an arithmetic number, because the mean of its divisors is an integer number (71428194).

Almost surely, 2^142856387 is an apocalyptic number.

142856387 is a deficient number, since it is larger than the sum of its proper divisors (1).

142856387 is an equidigital number, since it uses as much as digits as its factorization.

142856387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 142856387 is about 11952.2544735293. The cubic root of 142856387 is about 522.7570366023.

The spelling of 142856387 in words is "one hundred forty-two million, eight hundred fifty-six thousand, three hundred eighty-seven".