142442111 has 8 divisors (see below), whose sum is σ = 165862944. Its totient is φ = 119789280.

The previous prime is 142442093. The next prime is 142442129. The reversal of 142442111 is 111244241.

It is an interprime number because it is at equal distance from previous prime (142442093) and next prime (142442129).

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-142442111 is a prime.

It is a super-2 number, since 2×142442111² = 40579509972272642, 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 (142442161) 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, 191600 + ... + 192341.

It is an arithmetic number, because the mean of its divisors is an integer number (20732868).

Almost surely, 2^142442111 is an apocalyptic number.

142442111 is a deficient number, since it is larger than the sum of its proper divisors (23420833).

142442111 is an equidigital number, since it uses as much as digits as its factorization.

142442111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384001.

The product of its digits is 256, while the sum is 20.

The square root of 142442111 is about 11934.9114366216. The cubic root of 142442111 is about 522.2512247176.

Adding to 142442111 its reverse (111244241), we get a palindrome (253686352).

The spelling of 142442111 in words is "one hundred forty-two million, four hundred forty-two thousand, one hundred eleven".