123421023 has 16 divisors (see below), whose sum is σ = 199468800. Its totient is φ = 74800440.

The previous prime is 123421009. The next prime is 123421031. The reversal of 123421023 is 320124321.

It is not a de Polignac number, because 123421023 - 2⁴ = 123421007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123420987 and 123421005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421033) 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, 207483 + ... + 208076.

It is an arithmetic number, because the mean of its divisors is an integer number (12466800).

Almost surely, 2^123421023 is an apocalyptic number.

123421023 is a deficient number, since it is larger than the sum of its proper divisors (76047777).

123421023 is a wasteful number, since it uses less digits than its factorization.

123421023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415579 (or 415573 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123421023 is about 11109.5014739636. The cubic root of 123421023 is about 497.8857699970.

Adding to 123421023 its reverse (320124321), we get a palindrome (443545344).

The spelling of 123421023 in words is "one hundred twenty-three million, four hundred twenty-one thousand, twenty-three".