142268381 has 4 divisors (see below), whose sum is σ = 145576992. Its totient is φ = 138959772.

The previous prime is 142268339. The next prime is 142268387. The reversal of 142268381 is 183862241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142268381 - 2¹⁴ = 142251997 is a prime.

It is a super-2 number, since 2×142268381² = 40480584464722322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142268387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654241 + ... + 1654326.

It is an arithmetic number, because the mean of its divisors is an integer number (36394248).

Almost surely, 2^142268381 is an apocalyptic number.

It is an amenable number.

142268381 is a deficient number, since it is larger than the sum of its proper divisors (3308611).

142268381 is an equidigital number, since it uses as much as digits as its factorization.

142268381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308610.

The product of its digits is 18432, while the sum is 35.

The square root of 142268381 is about 11927.6309885912. The cubic root of 142268381 is about 522.0388165182.

The spelling of 142268381 in words is "one hundred forty-two million, two hundred sixty-eight thousand, three hundred eighty-one".