140341921 has 2 divisors, whose sum is σ = 140341922. Its totient is φ = 140341920.

The previous prime is 140341913. The next prime is 140341939. The reversal of 140341921 is 129143041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137733696 + 2608225 = 11736^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 140341921 - 2³ = 140341913 is a prime.

It is not a weakly prime, because it can be changed into another prime (140341951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70170960 + 70170961.

It is an arithmetic number, because the mean of its divisors is an integer number (70170961).

Almost surely, 2^140341921 is an apocalyptic number.

It is an amenable number.

140341921 is a deficient number, since it is larger than the sum of its proper divisors (1).

140341921 is an equidigital number, since it uses as much as digits as its factorization.

140341921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 140341921 is about 11846.5995543025. The cubic root of 140341921 is about 519.6717862247.

Adding to 140341921 its reverse (129143041), we get a palindrome (269484962).

The spelling of 140341921 in words is "one hundred forty million, three hundred forty-one thousand, nine hundred twenty-one".