123661441 has 2 divisors, whose sum is σ = 123661442. Its totient is φ = 123661440.

The previous prime is 123661429. The next prime is 123661459. The reversal of 123661441 is 144166321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123121216 + 540225 = 11096^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 123661441 - 2¹⁷ = 123530369 is a prime.

It is not a weakly prime, because it can be changed into another prime (123661411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61830720 + 61830721.

It is an arithmetic number, because the mean of its divisors is an integer number (61830721).

Almost surely, 2^123661441 is an apocalyptic number.

It is an amenable number.

123661441 is a deficient number, since it is larger than the sum of its proper divisors (1).

123661441 is an equidigital number, since it uses as much as digits as its factorization.

123661441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 123661441 is about 11120.3165872200. The cubic root of 123661441 is about 498.2088458623.

The spelling of 123661441 in words is "one hundred twenty-three million, six hundred sixty-one thousand, four hundred forty-one".