420021323 has 4 divisors (see below), whose sum is σ = 421048680. Its totient is φ = 418993968.

The previous prime is 420021293. The next prime is 420021347. The reversal of 420021323 is 323120024.

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 420021323 - 2¹⁴ = 420004939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420021223) 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, 513065 + ... + 513882.

It is an arithmetic number, because the mean of its divisors is an integer number (105262170).

Almost surely, 2^420021323 is an apocalyptic number.

420021323 is a deficient number, since it is larger than the sum of its proper divisors (1027357).

420021323 is a wasteful number, since it uses less digits than its factorization.

420021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027356.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 420021323 is about 20494.4217532479. The cubic root of 420021323 is about 748.8999119380.

Adding to 420021323 its reverse (323120024), we get a palindrome (743141347).

The spelling of 420021323 in words is "four hundred twenty million, twenty-one thousand, three hundred twenty-three".