142442311 has 8 divisors (see below), whose sum is σ = 156616704. Its totient is φ = 128472120.

The previous prime is 142442281. The next prime is 142442347. The reversal of 142442311 is 113244241.

It is a happy number.

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-142442311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142443311) 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, 49585 + ... + 52378.

It is an arithmetic number, because the mean of its divisors is an integer number (19577088).

Almost surely, 2^142442311 is an apocalyptic number.

142442311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142442311 is a deficient number, since it is larger than the sum of its proper divisors (14174393).

142442311 is a wasteful number, since it uses less digits than its factorization.

142442311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102101.

The product of its digits is 768, while the sum is 22.

The square root of 142442311 is about 11934.9198153988. The cubic root of 142442311 is about 522.2514691448.

Adding to 142442311 its reverse (113244241), we get a palindrome (255686552).

The spelling of 142442311 in words is "one hundred forty-two million, four hundred forty-two thousand, three hundred eleven".