142240105 has 32 divisors (see below), whose sum is σ = 209986560. Its totient is φ = 90270720.

The previous prime is 142240103. The next prime is 142240123. The reversal of 142240105 is 501042241.

142240105 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 142240105 - 2¹ = 142240103 is a prime.

It is a super-2 number, since 2×142240105² = 40464494940822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142240103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34336 + ... + 38254.

It is an arithmetic number, because the mean of its divisors is an integer number (6562080).

Almost surely, 2^142240105 is an apocalyptic number.

It is an amenable number.

142240105 is a deficient number, since it is larger than the sum of its proper divisors (67746455).

142240105 is a wasteful number, since it uses less digits than its factorization.

142240105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 142240105 is about 11926.4456146834. The cubic root of 142240105 is about 522.0042289602.

Adding to 142240105 its reverse (501042241), we get a palindrome (643282346).

The spelling of 142240105 in words is "one hundred forty-two million, two hundred forty thousand, one hundred five".