140442901 has 2 divisors, whose sum is σ = 140442902. Its totient is φ = 140442900.

The previous prime is 140442893. The next prime is 140442931. The reversal of 140442901 is 109244041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140398801 + 44100 = 11849^2 + 210^2 .

It is an emirp because it is prime and its reverse (109244041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140442901 - 2³ = 140442893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140442931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70221450 + 70221451.

It is an arithmetic number, because the mean of its divisors is an integer number (70221451).

Almost surely, 2^140442901 is an apocalyptic number.

It is an amenable number.

140442901 is a deficient number, since it is larger than the sum of its proper divisors (1).

140442901 is an equidigital number, since it uses as much as digits as its factorization.

140442901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 140442901 is about 11850.8607704251. The cubic root of 140442901 is about 519.7963958817.

Adding to 140442901 its reverse (109244041), we get a palindrome (249686942).

The spelling of 140442901 in words is "one hundred forty million, four hundred forty-two thousand, nine hundred one".