123651321 has 8 divisors (see below), whose sum is σ = 165185760. Its totient is φ = 82275552.

The previous prime is 123651317. The next prime is 123651329. The reversal of 123651321 is 123156321.

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

It is not a de Polignac number, because 123651321 - 2² = 123651317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123651291 and 123651300.

It is not an unprimeable number, because it can be changed into a prime (123651329) 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 7 ways as a sum of consecutive naturals, for example, 37836 + ... + 40973.

It is an arithmetic number, because the mean of its divisors is an integer number (20648220).

Almost surely, 2^123651321 is an apocalyptic number.

It is an amenable number.

123651321 is a deficient number, since it is larger than the sum of its proper divisors (41534439).

123651321 is an equidigital number, since it uses as much as digits as its factorization.

123651321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79335.

The product of its digits is 1080, while the sum is 24.

The square root of 123651321 is about 11119.8615548936. The cubic root of 123651321 is about 498.1952549617.

The spelling of 123651321 in words is "one hundred twenty-three million, six hundred fifty-one thousand, three hundred twenty-one".