142943381 has 8 divisors (see below), whose sum is σ = 164982144. Its totient is φ = 121309200.

The previous prime is 142943369. The next prime is 142943399. The reversal of 142943381 is 183349241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142943381 is a prime.

It is a super-2 number, since 2×142943381² = 40865620343422322, 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 (142943341) 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, 100385 + ... + 101798.

It is an arithmetic number, because the mean of its divisors is an integer number (20622768).

Almost surely, 2^142943381 is an apocalyptic number.

It is an amenable number.

142943381 is a deficient number, since it is larger than the sum of its proper divisors (22038763).

142943381 is a wasteful number, since it uses less digits than its factorization.

142943381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202291.

The product of its digits is 20736, while the sum is 35.

The square root of 142943381 is about 11955.8931494054. The cubic root of 142943381 is about 522.8631279913.

The spelling of 142943381 in words is "one hundred forty-two million, nine hundred forty-three thousand, three hundred eighty-one".