421503449 has 2 divisors, whose sum is σ = 421503450. Its totient is φ = 421503448.

The previous prime is 421503413. The next prime is 421503469. The reversal of 421503449 is 944305124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215150224 + 206353225 = 14668^2 + 14365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421503449 is a prime.

It is not a weakly prime, because it can be changed into another prime (421503469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210751724 + 210751725.

It is an arithmetic number, because the mean of its divisors is an integer number (210751725).

Almost surely, 2^421503449 is an apocalyptic number.

It is an amenable number.

421503449 is a deficient number, since it is larger than the sum of its proper divisors (1).

421503449 is an equidigital number, since it uses as much as digits as its factorization.

421503449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 421503449 is about 20530.5491645986. The cubic root of 421503449 is about 749.7797569600.

The spelling of 421503449 in words is "four hundred twenty-one million, five hundred three thousand, four hundred forty-nine".