421367321 has 32 divisors (see below), whose sum is σ = 472469760. Its totient is φ = 374169600.

The previous prime is 421367311. The next prime is 421367327. The reversal of 421367321 is 123763124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421367321 - 2⁶ = 421367257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421367327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4343945 + ... + 4344041.

It is an arithmetic number, because the mean of its divisors is an integer number (14764680).

Almost surely, 2^421367321 is an apocalyptic number.

It is an amenable number.

421367321 is a deficient number, since it is larger than the sum of its proper divisors (51102439).

421367321 is a wasteful number, since it uses less digits than its factorization.

421367321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its digits is 6048, while the sum is 29.

The square root of 421367321 is about 20527.2336421643. The cubic root of 421367321 is about 749.6990324260.

The spelling of 421367321 in words is "four hundred twenty-one million, three hundred sixty-seven thousand, three hundred twenty-one".