142123311 has 12 divisors (see below), whose sum is σ = 223952040. Its totient is φ = 86135280.

The previous prime is 142123309. The next prime is 142123339. The reversal of 142123311 is 113321241.

142123311 is a `hidden beast` number, since 1 + 421 + 233 + 11 = 666.

It is not a de Polignac number, because 142123311 - 2¹ = 142123309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142123301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717696 + ... + 717893.

It is an arithmetic number, because the mean of its divisors is an integer number (18662670).

Almost surely, 2^142123311 is an apocalyptic number.

142123311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142123311 is a deficient number, since it is larger than the sum of its proper divisors (81828729).

142123311 is a wasteful number, since it uses less digits than its factorization.

142123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435606 (or 1435603 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 142123311 is about 11921.5481796619. The cubic root of 142123311 is about 521.8613164854.

Adding to 142123311 its reverse (113321241), we get a palindrome (255444552).

The spelling of 142123311 in words is "one hundred forty-two million, one hundred twenty-three thousand, three hundred eleven".