123156241 has 4 divisors (see below), whose sum is σ = 132629812. Its totient is φ = 113682672.

The previous prime is 123156217. The next prime is 123156281. The reversal of 123156241 is 142651321.

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 10265616 + 112890625 = 3204^2 + 10625^2 .

It is a cyclic number.

It is not a de Polignac number, because 123156241 - 2¹⁷ = 123025169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123156281) 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, 4736766 + ... + 4736791.

It is an arithmetic number, because the mean of its divisors is an integer number (33157453).

Almost surely, 2^123156241 is an apocalyptic number.

It is an amenable number.

123156241 is a deficient number, since it is larger than the sum of its proper divisors (9473571).

123156241 is an equidigital number, since it uses as much as digits as its factorization.

123156241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473570.

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

The square root of 123156241 is about 11097.5781592201. The cubic root of 123156241 is about 497.5294677124.

The spelling of 123156241 in words is "one hundred twenty-three million, one hundred fifty-six thousand, two hundred forty-one".