421566023 has 8 divisors (see below), whose sum is σ = 432939408. Its totient is φ = 410264064.

The previous prime is 421565999. The next prime is 421566031. The reversal of 421566023 is 320665124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421566023 - 2²⁴ = 404788807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421566043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5786 + ... + 29607.

It is an arithmetic number, because the mean of its divisors is an integer number (54117426).

Almost surely, 2^421566023 is an apocalyptic number.

421566023 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

421566023 is a deficient number, since it is larger than the sum of its proper divisors (11373385).

421566023 is a wasteful number, since it uses less digits than its factorization.

421566023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35713.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 421566023 is about 20532.0730322099. The cubic root of 421566023 is about 749.8168578007.

The spelling of 421566023 in words is "four hundred twenty-one million, five hundred sixty-six thousand, twenty-three".