423504121 has 4 divisors (see below), whose sum is σ = 423648244. Its totient is φ = 423360000.

The previous prime is 423504101. The next prime is 423504149. The reversal of 423504121 is 121405324.

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 98783721 + 324720400 = 9939^2 + 18020^2 .

It is a cyclic number.

It is not a de Polignac number, because 423504121 - 2⁵ = 423504089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423504092 and 423504101.

It is not an unprimeable number, because it can be changed into a prime (423504101) 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, 67560 + ... + 73561.

It is an arithmetic number, because the mean of its divisors is an integer number (105912061).

Almost surely, 2^423504121 is an apocalyptic number.

It is an amenable number.

423504121 is a deficient number, since it is larger than the sum of its proper divisors (144123).

423504121 is a wasteful number, since it uses less digits than its factorization.

423504121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144122.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 423504121 is about 20579.2157527929. The cubic root of 423504121 is about 750.9641650203.

Adding to 423504121 its reverse (121405324), we get a palindrome (544909445).

The spelling of 423504121 in words is "four hundred twenty-three million, five hundred four thousand, one hundred twenty-one".