140105643 has 16 divisors (see below), whose sum is σ = 194730240. Its totient is φ = 89518176.

The previous prime is 140105633. The next prime is 140105663. The reversal of 140105643 is 346501041.

It is not a de Polignac number, because 140105643 - 2⁶ = 140105579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140105633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1983 + ... + 16856.

It is an arithmetic number, because the mean of its divisors is an integer number (12170640).

Almost surely, 2^140105643 is an apocalyptic number.

140105643 is a deficient number, since it is larger than the sum of its proper divisors (54624597).

140105643 is a wasteful number, since it uses less digits than its factorization.

140105643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18946.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 140105643 is about 11836.6229558941. The cubic root of 140105643 is about 519.3799846458.

Adding to 140105643 its reverse (346501041), we get a palindrome (486606684).

The spelling of 140105643 in words is "one hundred forty million, one hundred five thousand, six hundred forty-three".