421123 has 2 divisors, whose sum is σ = 421124. Its totient is φ = 421122.

The previous prime is 421121. The next prime is 421133. The reversal of 421123 is 321124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421123 - 2¹ = 421121 is a prime.

It is a super-2 number, since 2×421123² = 354689162258, which contains 22 as substring.

Together with 421121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (421121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210561 + 210562.

It is an arithmetic number, because the mean of its divisors is an integer number (210562).

2⁴²¹¹²³ is an apocalyptic number.

421123 is a deficient number, since it is larger than the sum of its proper divisors (1).

421123 is an equidigital number, since it uses as much as digits as its factorization.

421123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 13.

The square root of 421123 is about 648.9399047678. The cubic root of 421123 is about 74.9554105327.

Adding to 421123 its reverse (321124), we get a palindrome (742247).

Subtracting from 421123 its reverse (321124), we obtain a palindrome (99999).

The spelling of 421123 in words is "four hundred twenty-one thousand, one hundred twenty-three", and thus it is an iban number.