123841247 has 4 divisors (see below), whose sum is σ = 126721320. Its totient is φ = 120961176.

The previous prime is 123841219. The next prime is 123841261. The reversal of 123841247 is 742148321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123841247 - 2²⁰ = 122792671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123841217) 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, 1439972 + ... + 1440057.

It is an arithmetic number, because the mean of its divisors is an integer number (31680330).

Almost surely, 2^123841247 is an apocalyptic number.

123841247 is a deficient number, since it is larger than the sum of its proper divisors (2880073).

123841247 is an equidigital number, since it uses as much as digits as its factorization.

123841247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880072.

The product of its digits is 10752, while the sum is 32.

The square root of 123841247 is about 11128.3982225655. The cubic root of 123841247 is about 498.4501971857.

Adding to 123841247 its reverse (742148321), we get a palindrome (865989568).

It can be divided in two parts, 12384 and 1247, that added together give a palindrome (13631).

The spelling of 123841247 in words is "one hundred twenty-three million, eight hundred forty-one thousand, two hundred forty-seven".