421323504 has 80 divisors (see below), whose sum is σ = 1246205952. Its totient is φ = 120155904.

The previous prime is 421323481. The next prime is 421323527. The reversal of 421323504 is 405323124.

It is an interprime number because it is at equal distance from previous prime (421323481) and next prime (421323527).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289242 + ... + 290694.

Almost surely, 2^421323504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421323504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623102976).

421323504 is an abundant number, since it is smaller than the sum of its proper divisors (824882448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421323504 is a wasteful number, since it uses less digits than its factorization.

421323504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2328 counting only the distinct ones).

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

The square root of 421323504 is about 20526.1663249619. The cubic root of 421323504 is about 749.6730450435.

Adding to 421323504 its reverse (405323124), we get a palindrome (826646628).

The spelling of 421323504 in words is "four hundred twenty-one million, three hundred twenty-three thousand, five hundred four".