142817381 has 8 divisors (see below), whose sum is σ = 163301184. Its totient is φ = 122353920.

The previous prime is 142817377. The next prime is 142817383. The reversal of 142817381 is 183718241.

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 142817381 - 2² = 142817377 is a prime.

It is a super-2 number, since 2×142817381² = 40793608631398322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142817383) 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 in 7 ways as a sum of consecutive naturals, for example, 15566 + ... + 22976.

It is an arithmetic number, because the mean of its divisors is an integer number (20412648).

Almost surely, 2^142817381 is an apocalyptic number.

It is an amenable number.

142817381 is a deficient number, since it is larger than the sum of its proper divisors (20483803).

142817381 is an equidigital number, since it uses as much as digits as its factorization.

142817381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10171.

The product of its digits is 10752, while the sum is 35.

The square root of 142817381 is about 11950.6226197634. The cubic root of 142817381 is about 522.7094538106.

The spelling of 142817381 in words is "one hundred forty-two million, eight hundred seventeen thousand, three hundred eighty-one".