421424453 has 4 divisors (see below), whose sum is σ = 421687980. Its totient is φ = 421160928.

The previous prime is 421424431. The next prime is 421424483. The reversal of 421424453 is 354424124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 291965569 + 129458884 = 17087^2 + 11378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421424453 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 (421424483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129350 + ... + 132567.

It is an arithmetic number, because the mean of its divisors is an integer number (105421995).

Almost surely, 2^421424453 is an apocalyptic number.

It is an amenable number.

421424453 is a deficient number, since it is larger than the sum of its proper divisors (263527).

421424453 is a wasteful number, since it uses less digits than its factorization.

421424453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263526.

The product of its digits is 15360, while the sum is 29.

The square root of 421424453 is about 20528.6252096920. The cubic root of 421424453 is about 749.7329140833.

Adding to 421424453 its reverse (354424124), we get a palindrome (775848577).

The spelling of 421424453 in words is "four hundred twenty-one million, four hundred twenty-four thousand, four hundred fifty-three".