421504323 has 4 divisors (see below), whose sum is σ = 562005768. Its totient is φ = 281002880.

The previous prime is 421504277. The next prime is 421504373. The reversal of 421504323 is 323405124.

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

It is a cyclic number.

It is not a de Polignac number, because 421504323 - 2²¹ = 419407171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421504293 and 421504302.

It is not an unprimeable number, because it can be changed into a prime (421504373) 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, 70250718 + ... + 70250723.

It is an arithmetic number, because the mean of its divisors is an integer number (140501442).

Almost surely, 2^421504323 is an apocalyptic number.

421504323 is a deficient number, since it is larger than the sum of its proper divisors (140501445).

421504323 is a wasteful number, since it uses less digits than its factorization.

421504323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140501444.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 421504323 is about 20530.5704499412. The cubic root of 421504323 is about 749.7802751899.

Adding to 421504323 its reverse (323405124), we get a palindrome (744909447).

The spelling of 421504323 in words is "four hundred twenty-one million, five hundred four thousand, three hundred twenty-three".