123405532 has 24 divisors (see below), whose sum is σ = 228009600. Its totient is φ = 58279536.

The previous prime is 123405509. The next prime is 123405559. The reversal of 123405532 is 235504321.

It is a junction number, because it is equal to n+sod(n) for n = 123405497 and 123405506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25023 + ... + 29545.

It is an arithmetic number, because the mean of its divisors is an integer number (9500400).

Almost surely, 2^123405532 is an apocalyptic number.

It is an amenable number.

123405532 is a deficient number, since it is larger than the sum of its proper divisors (104604068).

123405532 is a wasteful number, since it uses less digits than its factorization.

123405532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4905 (or 4903 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 123405532 is about 11108.8042560845. The cubic root of 123405532 is about 497.8649386698.

Adding to 123405532 its reverse (235504321), we get a palindrome (358909853).

The spelling of 123405532 in words is "one hundred twenty-three million, four hundred five thousand, five hundred thirty-two".