123011432 has 8 divisors (see below), whose sum is σ = 230646450. Its totient is φ = 61505712.

The previous prime is 123011411. The next prime is 123011437. The reversal of 123011432 is 234110321.

It can be written as a sum of positive squares in only one way, i.e., 117375556 + 5635876 = 10834^2 + 2374^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 123011432.

It is not an unprimeable number, because it can be changed into a prime (123011437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7688207 + ... + 7688222.

Almost surely, 2^123011432 is an apocalyptic number.

It is an amenable number.

123011432 is a deficient number, since it is larger than the sum of its proper divisors (107635018).

123011432 is a wasteful number, since it uses less digits than its factorization.

123011432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15376435 (or 15376431 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123011432 is about 11091.0518887976. The cubic root of 123011432 is about 497.3343903038.

Adding to 123011432 its reverse (234110321), we get a palindrome (357121753).

The spelling of 123011432 in words is "one hundred twenty-three million, eleven thousand, four hundred thirty-two".