142501391 has 2 divisors, whose sum is σ = 142501392. Its totient is φ = 142501390.

The previous prime is 142501379. The next prime is 142501417. The reversal of 142501391 is 193105241.

It is an a-pointer prime, because the next prime (142501417) can be obtained adding 142501391 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142501391 - 2¹⁸ = 142239247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142501391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142501301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71250695 + 71250696.

It is an arithmetic number, because the mean of its divisors is an integer number (71250696).

Almost surely, 2^142501391 is an apocalyptic number.

142501391 is a deficient number, since it is larger than the sum of its proper divisors (1).

142501391 is an equidigital number, since it uses as much as digits as its factorization.

142501391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 142501391 is about 11937.3946487498. The cubic root of 142501391 is about 522.3236629374.

The spelling of 142501391 in words is "one hundred forty-two million, five hundred one thousand, three hundred ninety-one".