420212453 has 4 divisors (see below), whose sum is σ = 420489888. Its totient is φ = 419935020.

The previous prime is 420212449. The next prime is 420212467. The reversal of 420212453 is 354212024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420212453 - 2² = 420212449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420212423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136433 + ... + 139478.

It is an arithmetic number, because the mean of its divisors is an integer number (105122472).

Almost surely, 2^420212453 is an apocalyptic number.

It is an amenable number.

420212453 is a deficient number, since it is larger than the sum of its proper divisors (277435).

420212453 is a wasteful number, since it uses less digits than its factorization.

420212453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277434.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 420212453 is about 20499.0841990563. The cubic root of 420212453 is about 749.0134899291.

Adding to 420212453 its reverse (354212024), we get a palindrome (774424477).

The spelling of 420212453 in words is "four hundred twenty million, two hundred twelve thousand, four hundred fifty-three".