140132821 has 2 divisors, whose sum is σ = 140132822. Its totient is φ = 140132820.

The previous prime is 140132791. The next prime is 140132831. The reversal of 140132821 is 128231041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134792100 + 5340721 = 11610^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 140132821 - 2⁷ = 140132693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140132792 and 140132801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140132831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70066410 + 70066411.

It is an arithmetic number, because the mean of its divisors is an integer number (70066411).

Almost surely, 2^140132821 is an apocalyptic number.

It is an amenable number.

140132821 is a deficient number, since it is larger than the sum of its proper divisors (1).

140132821 is an equidigital number, since it uses as much as digits as its factorization.

140132821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 140132821 is about 11837.7709472687. The cubic root of 140132821 is about 519.4135659641.

Adding to 140132821 its reverse (128231041), we get a palindrome (268363862).

The spelling of 140132821 in words is "one hundred forty million, one hundred thirty-two thousand, eight hundred twenty-one".