123785841 has 4 divisors (see below), whose sum is σ = 165047792. Its totient is φ = 82523892.

The previous prime is 123785807. The next prime is 123785843. The reversal of 123785841 is 148587321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123785841 - 2¹⁵ = 123753073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123785841.

It is not an unprimeable number, because it can be changed into a prime (123785843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20630971 + ... + 20630976.

It is an arithmetic number, because the mean of its divisors is an integer number (41261948).

Almost surely, 2^123785841 is an apocalyptic number.

It is an amenable number.

123785841 is a deficient number, since it is larger than the sum of its proper divisors (41261951).

123785841 is an equidigital number, since it uses as much as digits as its factorization.

123785841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41261950.

The product of its digits is 53760, while the sum is 39.

The square root of 123785841 is about 11125.9085471704. The cubic root of 123785841 is about 498.3758513279.

It can be divided in two parts, 1237 and 85841, that added together give a palindrome (87078).

The spelling of 123785841 in words is "one hundred twenty-three million, seven hundred eighty-five thousand, eight hundred forty-one".