142333381 has 2 divisors, whose sum is σ = 142333382. Its totient is φ = 142333380.

The previous prime is 142333379. The next prime is 142333417. The reversal of 142333381 is 183333241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124768900 + 17564481 = 11170^2 + 4191^2 .

It is a cyclic number.

It is not a de Polignac number, because 142333381 - 2¹ = 142333379 is a prime.

It is a super-2 number, since 2×142333381² = 40517582693782322, which contains 22 as substring.

Together with 142333379, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142333481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71166690 + 71166691.

It is an arithmetic number, because the mean of its divisors is an integer number (71166691).

Almost surely, 2^142333381 is an apocalyptic number.

It is an amenable number.

142333381 is a deficient number, since it is larger than the sum of its proper divisors (1).

142333381 is an equidigital number, since it uses as much as digits as its factorization.

142333381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 142333381 is about 11930.3554431542. The cubic root of 142333381 is about 522.1183079611.

The spelling of 142333381 in words is "one hundred forty-two million, three hundred thirty-three thousand, three hundred eighty-one".