140442101 has 4 divisors (see below), whose sum is σ = 141754752. Its totient is φ = 139129452.

The previous prime is 140442079. The next prime is 140442149. The reversal of 140442101 is 101244041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101244041 = 97 ⋅1043753.

It is a cyclic number.

It is not a de Polignac number, because 140442101 - 2⁶ = 140442037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140442101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140442901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656165 + ... + 656378.

It is an arithmetic number, because the mean of its divisors is an integer number (35438688).

Almost surely, 2^140442101 is an apocalyptic number.

It is an amenable number.

140442101 is a deficient number, since it is larger than the sum of its proper divisors (1312651).

140442101 is a wasteful number, since it uses less digits than its factorization.

140442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312650.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 140442101 is about 11850.8270175545. The cubic root of 140442101 is about 519.7954089138.

Adding to 140442101 its reverse (101244041), we get a palindrome (241686142).

The spelling of 140442101 in words is "one hundred forty million, four hundred forty-two thousand, one hundred one".