142021105 has 16 divisors (see below), whose sum is σ = 179827200. Its totient is φ = 107377920.

The previous prime is 142021097. The next prime is 142021129. The reversal of 142021105 is 501120241.

142021105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142021105 - 2³ = 142021097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43945 + ... + 47065.

It is an arithmetic number, because the mean of its divisors is an integer number (11239200).

Almost surely, 2^142021105 is an apocalyptic number.

It is an amenable number.

142021105 is a deficient number, since it is larger than the sum of its proper divisors (37806095).

142021105 is a wasteful number, since it uses less digits than its factorization.

142021105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 142021105 is about 11917.2608010398. The cubic root of 142021105 is about 521.7361900534.

Adding to 142021105 its reverse (501120241), we get a palindrome (643141346).

The spelling of 142021105 in words is "one hundred forty-two million, twenty-one thousand, one hundred five".