123621522 has 16 divisors (see below), whose sum is σ = 247811520. Its totient is φ = 41112432.

The previous prime is 123621497. The next prime is 123621523. The reversal of 123621522 is 225126321.

It is a junction number, because it is equal to n+sod(n) for n = 123621492 and 123621501.

It is not an unprimeable number, because it can be changed into a prime (123621523) 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 7 ways as a sum of consecutive naturals, for example, 20833 + ... + 26100.

It is an arithmetic number, because the mean of its divisors is an integer number (15488220).

Almost surely, 2^123621522 is an apocalyptic number.

123621522 is an abundant number, since it is smaller than the sum of its proper divisors (124189998).

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

123621522 is a wasteful number, since it uses less digits than its factorization.

123621522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47377.

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

The square root of 123621522 is about 11118.5215743821. The cubic root of 123621522 is about 498.1552313614.

Adding to 123621522 its reverse (225126321), we get a palindrome (348747843).

The spelling of 123621522 in words is "one hundred twenty-three million, six hundred twenty-one thousand, five hundred twenty-two".