421465823 has 4 divisors (see below), whose sum is σ = 439790448. Its totient is φ = 403141200.

The previous prime is 421465817. The next prime is 421465843. The reversal of 421465823 is 328564124.

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 421465823 - 2¹⁴ = 421449439 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 (421465843) 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, 9162278 + ... + 9162323.

It is an arithmetic number, because the mean of its divisors is an integer number (109947612).

Almost surely, 2^421465823 is an apocalyptic number.

421465823 is a deficient number, since it is larger than the sum of its proper divisors (18324625).

421465823 is a wasteful number, since it uses less digits than its factorization.

421465823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18324624.

The product of its digits is 46080, while the sum is 35.

The square root of 421465823 is about 20529.6328023664. The cubic root of 421465823 is about 749.7574463061.

The spelling of 421465823 in words is "four hundred twenty-one million, four hundred sixty-five thousand, eight hundred twenty-three".