123201615 has 8 divisors (see below), whose sum is σ = 197122608. Its totient is φ = 65707520.

The previous prime is 123201613. The next prime is 123201623. The reversal of 123201615 is 516102321.

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

It is not a de Polignac number, because 123201615 - 2¹ = 123201613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123201591 and 123201600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123201613) 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, 4106706 + ... + 4106735.

It is an arithmetic number, because the mean of its divisors is an integer number (24640326).

Almost surely, 2^123201615 is an apocalyptic number.

123201615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123201615 is a deficient number, since it is larger than the sum of its proper divisors (73920993).

123201615 is an equidigital number, since it uses as much as digits as its factorization.

123201615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213449.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 123201615 is about 11099.6222908710. The cubic root of 123201615 is about 497.5905611929.

Adding to 123201615 its reverse (516102321), we get a palindrome (639303936).

The spelling of 123201615 in words is "one hundred twenty-three million, two hundred one thousand, six hundred fifteen".