140105642 has 8 divisors (see below), whose sum is σ = 210344196. Its totient is φ = 69990912.

The previous prime is 140105633. The next prime is 140105663. The reversal of 140105642 is 246501041.

It can be written as a sum of positive squares in 2 ways, for example, as 135047641 + 5058001 = 11621^2 + 2249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28073 + ... + 32684.

Almost surely, 2^140105642 is an apocalyptic number.

140105642 is a deficient number, since it is larger than the sum of its proper divisors (70238554).

140105642 is a wasteful number, since it uses less digits than its factorization.

140105642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61912.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 140105642 is about 11836.6229136524. The cubic root of 140105642 is about 519.3799834101.

Adding to 140105642 its reverse (246501041), we get a palindrome (386606683).

The spelling of 140105642 in words is "one hundred forty million, one hundred five thousand, six hundred forty-two".