420452447 has 2 divisors, whose sum is σ = 420452448. Its totient is φ = 420452446.

The previous prime is 420452413. The next prime is 420452471. The reversal of 420452447 is 744254024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420452447 - 2⁸ = 420452191 is a prime.

It is equal to p_22367255 and since 420452447 and 22367255 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420452477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210226223 + 210226224.

It is an arithmetic number, because the mean of its divisors is an integer number (210226224).

Almost surely, 2^420452447 is an apocalyptic number.

420452447 is a deficient number, since it is larger than the sum of its proper divisors (1).

420452447 is an equidigital number, since it uses as much as digits as its factorization.

420452447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 32.

The square root of 420452447 is about 20504.9371371872. The cubic root of 420452447 is about 749.1560563313.

The spelling of 420452447 in words is "four hundred twenty million, four hundred fifty-two thousand, four hundred forty-seven".