140821403 has 2 divisors, whose sum is σ = 140821404. Its totient is φ = 140821402.

The previous prime is 140821393. The next prime is 140821441. The reversal of 140821403 is 304128041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140821403 - 2⁶ = 140821339 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (140821903) 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, 70410701 + 70410702.

It is an arithmetic number, because the mean of its divisors is an integer number (70410702).

Almost surely, 2^140821403 is an apocalyptic number.

140821403 is a deficient number, since it is larger than the sum of its proper divisors (1).

140821403 is an equidigital number, since it uses as much as digits as its factorization.

140821403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 140821403 is about 11866.8194138109. The cubic root of 140821403 is about 520.2629377826.

Adding to 140821403 its reverse (304128041), we get a palindrome (444949444).

The spelling of 140821403 in words is "one hundred forty million, eight hundred twenty-one thousand, four hundred three".