123136441 has 4 divisors (see below), whose sum is σ = 123171300. Its totient is φ = 123101584.

The previous prime is 123136399. The next prime is 123136451. The reversal of 123136441 is 144631321.

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 26998416 + 96138025 = 5196^2 + 9805^2 .

It is a cyclic number.

It is not a de Polignac number, because 123136441 - 2⁷ = 123136313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123136451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11446 + ... + 19423.

It is an arithmetic number, because the mean of its divisors is an integer number (30792825).

Almost surely, 2^123136441 is an apocalyptic number.

It is an amenable number.

123136441 is a deficient number, since it is larger than the sum of its proper divisors (34859).

123136441 is an equidigital number, since it uses as much as digits as its factorization.

123136441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34858.

The product of its digits is 1728, while the sum is 25.

The square root of 123136441 is about 11096.6860368310. The cubic root of 123136441 is about 497.5028034488.

Adding to 123136441 its reverse (144631321), we get a palindrome (267767762).

The spelling of 123136441 in words is "one hundred twenty-three million, one hundred thirty-six thousand, four hundred forty-one".