142368391 has 8 divisors (see below), whose sum is σ = 155531664. Its totient is φ = 129241920.

The previous prime is 142368379. The next prime is 142368409. The reversal of 142368391 is 193863241.

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

It is a cyclic number.

It is not a de Polignac number, because 142368391 - 2¹⁵ = 142335623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142368391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142368371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (19441458).

Almost surely, 2^142368391 is an apocalyptic number.

142368391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142368391 is a deficient number, since it is larger than the sum of its proper divisors (13163273).

142368391 is a wasteful number, since it uses less digits than its factorization.

142368391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18401.

The product of its digits is 31104, while the sum is 37.

The square root of 142368391 is about 11931.8226185273. The cubic root of 142368391 is about 522.1611132475.

The spelling of 142368391 in words is "one hundred forty-two million, three hundred sixty-eight thousand, three hundred ninety-one".