140042106 has 12 divisors (see below), whose sum is σ = 303424602. Its totient is φ = 46680696.

The previous prime is 140042069. The next prime is 140042117. The reversal of 140042106 is 601240041.

It can be written as a sum of positive squares in only one way, i.e., 130988025 + 9054081 = 11445^2 + 3009^2 .

It is a super-2 number, since 2×140042106² = 39223582905830472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 7780117 = 140042106 / (1 + 4 + 0 + 0 + 4 + 2 + 1 + 0 + 6).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3890041 + ... + 3890076.

Almost surely, 2^140042106 is an apocalyptic number.

140042106 is an abundant number, since it is smaller than the sum of its proper divisors (163382496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140042106 is a wasteful number, since it uses less digits than its factorization.

140042106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780125 (or 7780122 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 140042106 is about 11833.9387356873. The cubic root of 140042106 is about 519.3014609569.

Adding to 140042106 its reverse (601240041), we get a palindrome (741282147).

It can be divided in two parts, 14004 and 2106, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 140042106 in words is "one hundred forty million, forty-two thousand, one hundred six".