423301421 has 4 divisors (see below), whose sum is σ = 423343644. Its totient is φ = 423259200.

The previous prime is 423301397. The next prime is 423301427. The reversal of 423301421 is 124103324.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 31696900 + 391604521 = 5630^2 + 19789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423301421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423301393 and 423301402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423301427) 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, 3461 + ... + 29301.

It is an arithmetic number, because the mean of its divisors is an integer number (105835911).

Almost surely, 2^423301421 is an apocalyptic number.

It is an amenable number.

423301421 is a deficient number, since it is larger than the sum of its proper divisors (42223).

423301421 is a wasteful number, since it uses less digits than its factorization.

423301421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42222.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 423301421 is about 20574.2902915265. The cubic root of 423301421 is about 750.8443356250.

Adding to 423301421 its reverse (124103324), we get a palindrome (547404745).

The spelling of 423301421 in words is "four hundred twenty-three million, three hundred one thousand, four hundred twenty-one".