420724459 has 2 divisors, whose sum is σ = 420724460. Its totient is φ = 420724458.

The previous prime is 420724453. The next prime is 420724463. The reversal of 420724459 is 954427024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420724459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420724453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210362229 + 210362230.

It is an arithmetic number, because the mean of its divisors is an integer number (210362230).

Almost surely, 2^420724459 is an apocalyptic number.

420724459 is a deficient number, since it is larger than the sum of its proper divisors (1).

420724459 is an equidigital number, since it uses as much as digits as its factorization.

420724459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 420724459 is about 20511.5689063514. The cubic root of 420724459 is about 749.3175771797.

The spelling of 420724459 in words is "four hundred twenty million, seven hundred twenty-four thousand, four hundred fifty-nine".