420406453 has 2 divisors, whose sum is σ = 420406454. Its totient is φ = 420406452.

The previous prime is 420406429. The next prime is 420406457. The reversal of 420406453 is 354604024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399080529 + 21325924 = 19977^2 + 4618^2 .

It is a cyclic number.

It is not a de Polignac number, because 420406453 - 2⁵ = 420406421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420406457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210203226 + 210203227.

It is an arithmetic number, because the mean of its divisors is an integer number (210203227).

Almost surely, 2^420406453 is an apocalyptic number.

It is an amenable number.

420406453 is a deficient number, since it is larger than the sum of its proper divisors (1).

420406453 is an equidigital number, since it uses as much as digits as its factorization.

420406453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 420406453 is about 20503.8155717418. The cubic root of 420406453 is about 749.1287381883.

The spelling of 420406453 in words is "four hundred twenty million, four hundred six thousand, four hundred fifty-three".