423021143 has 16 divisors (see below), whose sum is σ = 443076480. Its totient is φ = 403507104.

The previous prime is 423021127. The next prime is 423021161. The reversal of 423021143 is 341120324.

It is a cyclic number.

It is not a de Polignac number, because 423021143 - 2⁴ = 423021127 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 (423021163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 954680 + ... + 955122.

It is an arithmetic number, because the mean of its divisors is an integer number (27692280).

Almost surely, 2^423021143 is an apocalyptic number.

423021143 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

423021143 is a deficient number, since it is larger than the sum of its proper divisors (20055337).

423021143 is a wasteful number, since it uses less digits than its factorization.

423021143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 423021143 is about 20567.4777986996. The cubic root of 423021143 is about 750.6785817025.

Adding to 423021143 its reverse (341120324), we get a palindrome (764141467).

The spelling of 423021143 in words is "four hundred twenty-three million, twenty-one thousand, one hundred forty-three".