123561241 has 4 divisors (see below), whose sum is σ = 126900772. Its totient is φ = 120221712.

The previous prime is 123561239. The next prime is 123561247. The reversal of 123561241 is 142165321.

It is a happy number.

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 90326016 + 33235225 = 9504^2 + 5765^2 .

It is a cyclic number.

It is not a de Polignac number, because 123561241 - 2¹ = 123561239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123561247) 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, 1669710 + ... + 1669783.

It is an arithmetic number, because the mean of its divisors is an integer number (31725193).

Almost surely, 2^123561241 is an apocalyptic number.

It is an amenable number.

123561241 is a deficient number, since it is larger than the sum of its proper divisors (3339531).

123561241 is an equidigital number, since it uses as much as digits as its factorization.

123561241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339530.

The product of its digits is 1440, while the sum is 25.

The square root of 123561241 is about 11115.8104068035. The cubic root of 123561241 is about 498.0742471408.

The spelling of 123561241 in words is "one hundred twenty-three million, five hundred sixty-one thousand, two hundred forty-one".