140373421 has 2 divisors, whose sum is σ = 140373422. Its totient is φ = 140373420.

The previous prime is 140373397. The next prime is 140373473. The reversal of 140373421 is 124373041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120890025 + 19483396 = 10995^2 + 4414^2 .

It is a cyclic number.

It is not a de Polignac number, because 140373421 - 2⁷ = 140373293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140373221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70186710 + 70186711.

It is an arithmetic number, because the mean of its divisors is an integer number (70186711).

Almost surely, 2^140373421 is an apocalyptic number.

It is an amenable number.

140373421 is a deficient number, since it is larger than the sum of its proper divisors (1).

140373421 is an equidigital number, since it uses as much as digits as its factorization.

140373421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 140373421 is about 11847.9289751416. The cubic root of 140373421 is about 519.7106637427.

The spelling of 140373421 in words is "one hundred forty million, three hundred seventy-three thousand, four hundred twenty-one".