421040293 has 2 divisors, whose sum is σ = 421040294. Its totient is φ = 421040292.

The previous prime is 421040287. The next prime is 421040303. The reversal of 421040293 is 392040124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305305729 + 115734564 = 17473^2 + 10758^2 .

It is a cyclic number.

It is not a de Polignac number, because 421040293 - 2⁹ = 421039781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421040203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210520146 + 210520147.

It is an arithmetic number, because the mean of its divisors is an integer number (210520147).

Almost surely, 2^421040293 is an apocalyptic number.

It is an amenable number.

421040293 is a deficient number, since it is larger than the sum of its proper divisors (1).

421040293 is an equidigital number, since it uses as much as digits as its factorization.

421040293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 421040293 is about 20519.2663855217. The cubic root of 421040293 is about 749.5050322292.

The spelling of 421040293 in words is "four hundred twenty-one million, forty thousand, two hundred ninety-three".