421400023 has 8 divisors (see below), whose sum is σ = 460012176. Its totient is φ = 382838400.

The previous prime is 421400003. The next prime is 421400027. The reversal of 421400023 is 320004124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421400023 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 (421400027) 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, 6015 + ... + 29647.

It is an arithmetic number, because the mean of its divisors is an integer number (57501522).

Almost surely, 2^421400023 is an apocalyptic number.

421400023 is a deficient number, since it is larger than the sum of its proper divisors (38612153).

421400023 is a wasteful number, since it uses less digits than its factorization.

421400023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25265.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 421400023 is about 20528.0301782709. The cubic root of 421400023 is about 749.7184264498.

Adding to 421400023 its reverse (320004124), we get a palindrome (741404147).

The spelling of 421400023 in words is "four hundred twenty-one million, four hundred thousand, twenty-three".