421243123 has 8 divisors (see below), whose sum is σ = 481585248. Its totient is φ = 360942144.

The previous prime is 421243103. The next prime is 421243157. The reversal of 421243123 is 321342124.

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 421243123 - 2⁹ = 421242611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421243094 and 421243103.

It is not an unprimeable number, because it can be changed into a prime (421243103) 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, 16215 + ... + 33247.

It is an arithmetic number, because the mean of its divisors is an integer number (60198156).

Almost surely, 2^421243123 is an apocalyptic number.

421243123 is a deficient number, since it is larger than the sum of its proper divisors (60342125).

421243123 is a wasteful number, since it uses less digits than its factorization.

421243123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20573.

The product of its digits is 1152, while the sum is 22.

The square root of 421243123 is about 20524.2082185891. The cubic root of 421243123 is about 749.6253672686.

Adding to 421243123 its reverse (321342124), we get a palindrome (742585247).

Subtracting from 421243123 its reverse (321342124), we obtain a palindrome (99900999).

The spelling of 421243123 in words is "four hundred twenty-one million, two hundred forty-three thousand, one hundred twenty-three".