142838391 has 8 divisors (see below), whose sum is σ = 190506880. Its totient is φ = 95197752.

The previous prime is 142838363. The next prime is 142838411. The reversal of 142838391 is 193838241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142838391 - 2¹⁴ = 142822007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142838321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14190 + ... + 22068.

It is an arithmetic number, because the mean of its divisors is an integer number (23813360).

Almost surely, 2^142838391 is an apocalyptic number.

142838391 is a deficient number, since it is larger than the sum of its proper divisors (47668489).

142838391 is an equidigital number, since it uses as much as digits as its factorization.

142838391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13925.

The product of its digits is 41472, while the sum is 39.

The square root of 142838391 is about 11951.5016211353. The cubic root of 142838391 is about 522.7350846479.

The spelling of 142838391 in words is "one hundred forty-two million, eight hundred thirty-eight thousand, three hundred ninety-one".