123661528 has 16 divisors (see below), whose sum is σ = 232908480. Its totient is φ = 61552608.

The previous prime is 123661523. The next prime is 123661537. The reversal of 123661528 is 825166321.

It is a junction number, because it is equal to n+sod(n) for n = 123661493 and 123661502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123661523) 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, 32875 + ... + 36442.

It is an arithmetic number, because the mean of its divisors is an integer number (14556780).

Almost surely, 2^123661528 is an apocalyptic number.

It is an amenable number.

123661528 is a deficient number, since it is larger than the sum of its proper divisors (109246952).

123661528 is a wasteful number, since it uses less digits than its factorization.

123661528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69546 (or 69542 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 123661528 is about 11120.3204989784. The cubic root of 123661528 is about 498.2089626979.

The spelling of 123661528 in words is "one hundred twenty-three million, six hundred sixty-one thousand, five hundred twenty-eight".