140332921 has 2 divisors, whose sum is σ = 140332922. Its totient is φ = 140332920.

The previous prime is 140332919. The next prime is 140332931. The reversal of 140332921 is 129233041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89567296 + 50765625 = 9464^2 + 7125^2 .

It is a cyclic number.

It is not a de Polignac number, because 140332921 - 2¹ = 140332919 is a prime.

Together with 140332919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (140332931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70166460 + 70166461.

It is an arithmetic number, because the mean of its divisors is an integer number (70166461).

Almost surely, 2^140332921 is an apocalyptic number.

It is an amenable number.

140332921 is a deficient number, since it is larger than the sum of its proper divisors (1).

140332921 is an equidigital number, since it uses as much as digits as its factorization.

140332921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 140332921 is about 11846.2196923744. The cubic root of 140332921 is about 519.6606772939.

Adding to 140332921 its reverse (129233041), we get a palindrome (269565962).

The spelling of 140332921 in words is "one hundred forty million, three hundred thirty-two thousand, nine hundred twenty-one".