123581741 has 4 divisors (see below), whose sum is σ = 123618300. Its totient is φ = 123545184.

The previous prime is 123581723. The next prime is 123581747. The reversal of 123581741 is 147185321.

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 82992100 + 40589641 = 9110^2 + 6371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123581741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123581698 and 123581707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123581747) 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, 12626 + ... + 20163.

It is an arithmetic number, because the mean of its divisors is an integer number (30904575).

Almost surely, 2^123581741 is an apocalyptic number.

It is an amenable number.

123581741 is a deficient number, since it is larger than the sum of its proper divisors (36559).

123581741 is an equidigital number, since it uses as much as digits as its factorization.

123581741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36558.

The product of its digits is 6720, while the sum is 32.

The square root of 123581741 is about 11116.7324785658. The cubic root of 123581741 is about 498.1017907226.

The spelling of 123581741 in words is "one hundred twenty-three million, five hundred eighty-one thousand, seven hundred forty-one".