421424553 has 16 divisors (see below), whose sum is σ = 627238656. Its totient is φ = 249468240.

The previous prime is 421424483. The next prime is 421424587. The reversal of 421424553 is 355424124.

It is not a de Polignac number, because 421424553 - 2¹⁰ = 421423529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421424553.

It is not an unprimeable number, because it can be changed into a prime (421424153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147075 + ... + 149912.

It is an arithmetic number, because the mean of its divisors is an integer number (39202416).

Almost surely, 2^421424553 is an apocalyptic number.

421424553 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

421424553 is a deficient number, since it is larger than the sum of its proper divisors (205814103).

421424553 is a wasteful number, since it uses less digits than its factorization.

421424553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297044.

The product of its digits is 19200, while the sum is 30.

The square root of 421424553 is about 20528.6276453152. The cubic root of 421424553 is about 749.7329733848.

Adding to 421424553 its reverse (355424124), we get a palindrome (776848677).

The spelling of 421424553 in words is "four hundred twenty-one million, four hundred twenty-four thousand, five hundred fifty-three".