123421089 has 24 divisors (see below), whose sum is σ = 182693056. Its totient is φ = 74052000.

The previous prime is 123421063. The next prime is 123421099. The reversal of 123421089 is 980124321.

It is not a de Polignac number, because 123421089 - 2⁷ = 123420961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123421009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35739 + ... + 39039.

Almost surely, 2^123421089 is an apocalyptic number.

It is an amenable number.

123421089 is a deficient number, since it is larger than the sum of its proper divisors (59271967).

123421089 is a wasteful number, since it uses less digits than its factorization.

123421089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429 (or 3418 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 123421089 is about 11109.5044443935. The cubic root of 123421089 is about 497.8858587460.

It can be divided in two parts, 12342 and 1089, that added together give a palindrome (13431).

The spelling of 123421089 in words is "one hundred twenty-three million, four hundred twenty-one thousand, eighty-nine".