123621225 has 96 divisors (see below), whose sum is σ = 256650240. Its totient is φ = 51114240.

The previous prime is 123621217. The next prime is 123621269. The reversal of 123621225 is 522126321.

It is not a de Polignac number, because 123621225 - 2³ = 123621217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123621195 and 123621204.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 402522 + ... + 402828.

It is an arithmetic number, because the mean of its divisors is an integer number (2673440).

Almost surely, 2^123621225 is an apocalyptic number.

123621225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123621225 is an abundant number, since it is smaller than the sum of its proper divisors (133029015).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123621225 is a wasteful number, since it uses less digits than its factorization.

123621225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 394 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 123621225 is about 11118.5082182818. The cubic root of 123621225 is about 498.1548324227.

Adding to 123621225 its reverse (522126321), we get a palindrome (645747546).

The spelling of 123621225 in words is "one hundred twenty-three million, six hundred twenty-one thousand, two hundred twenty-five".