123320401 has 4 divisors (see below), whose sum is σ = 125161072. Its totient is φ = 121479732.

The previous prime is 123320381. The next prime is 123320459. The reversal of 123320401 is 104023321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123320401 - 2⁵ = 123320369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123320471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920235 + ... + 920368.

It is an arithmetic number, because the mean of its divisors is an integer number (31290268).

Almost surely, 2^123320401 is an apocalyptic number.

It is an amenable number.

123320401 is a deficient number, since it is larger than the sum of its proper divisors (1840671).

123320401 is an equidigital number, since it uses as much as digits as its factorization.

123320401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840670.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123320401 is about 11104.9719045120. The cubic root of 123320401 is about 497.7504287035.

Adding to 123320401 its reverse (104023321), we get a palindrome (227343722).

The spelling of 123320401 in words is "one hundred twenty-three million, three hundred twenty thousand, four hundred one".