123640246 has 8 divisors (see below), whose sum is σ = 188001144. Its totient is φ = 60973200.

The previous prime is 123640243. The next prime is 123640271. The reversal of 123640246 is 642046321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123640243) 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, 423280 + ... + 423571.

It is an arithmetic number, because the mean of its divisors is an integer number (23500143).

Almost surely, 2^123640246 is an apocalyptic number.

123640246 is a deficient number, since it is larger than the sum of its proper divisors (64360898).

123640246 is an equidigital number, since it uses as much as digits as its factorization.

123640246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846926.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 123640246 is about 11119.3635609238. The cubic root of 123640246 is about 498.1803806707.

Adding to 123640246 its reverse (642046321), we get a palindrome (765686567).

The spelling of 123640246 in words is "one hundred twenty-three million, six hundred forty thousand, two hundred forty-six".