123017432 has 32 divisors (see below), whose sum is σ = 243060480. Its totient is φ = 58254240.

The previous prime is 123017417. The next prime is 123017441. The reversal of 123017432 is 234710321.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 123017398 and 123017407.

It is a congruent number.

It is an unprimeable number.

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, 15707 + ... + 22197.

It is an arithmetic number, because the mean of its divisors is an integer number (7595640).

Almost surely, 2^123017432 is an apocalyptic number.

It is an amenable number.

123017432 is a deficient number, since it is larger than the sum of its proper divisors (120043048).

123017432 is a wasteful number, since it uses less digits than its factorization.

123017432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623 (or 6619 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 123017432 is about 11091.3223738200. The cubic root of 123017432 is about 497.3424761588.

Adding to 123017432 its sum of digits (23), we get a triangular number (123017455 = T₁₅₆₈₅).

Adding to 123017432 its reverse (234710321), we get a palindrome (357727753).

The spelling of 123017432 in words is "one hundred twenty-three million, seventeen thousand, four hundred thirty-two".