123004421 has 4 divisors (see below), whose sum is σ = 123091692. Its totient is φ = 122917152.

The previous prime is 123004403. The next prime is 123004433. The reversal of 123004421 is 124400321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110145025 + 12859396 = 10495^2 + 3586^2 .

It is a cyclic number.

It is not a de Polignac number, because 123004421 - 2²² = 118810117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123004421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123000421) 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 3 ways as a sum of consecutive naturals, for example, 41486 + ... + 44351.

It is an arithmetic number, because the mean of its divisors is an integer number (30772923).

Almost surely, 2^123004421 is an apocalyptic number.

It is an amenable number.

123004421 is a deficient number, since it is larger than the sum of its proper divisors (87271).

123004421 is an equidigital number, since it uses as much as digits as its factorization.

123004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87270.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 123004421 is about 11090.7358186912. The cubic root of 123004421 is about 497.3249416490.

Adding to 123004421 its reverse (124400321), we get a palindrome (247404742).

The spelling of 123004421 in words is "one hundred twenty-three million, four thousand, four hundred twenty-one".