123405441 has 4 divisors (see below), whose sum is σ = 164540592. Its totient is φ = 82270292.

The previous prime is 123405427. The next prime is 123405463. The reversal of 123405441 is 144504321.

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 123405441 - 2⁶ = 123405377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123405241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20567571 + ... + 20567576.

It is an arithmetic number, because the mean of its divisors is an integer number (41135148).

Almost surely, 2^123405441 is an apocalyptic number.

It is an amenable number.

123405441 is a deficient number, since it is larger than the sum of its proper divisors (41135151).

123405441 is an equidigital number, since it uses as much as digits as its factorization.

123405441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41135150.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 123405441 is about 11108.8001602333. The cubic root of 123405441 is about 497.8648162935.

Adding to 123405441 its reverse (144504321), we get a palindrome (267909762).

The spelling of 123405441 in words is "one hundred twenty-three million, four hundred five thousand, four hundred forty-one".