72432123 has 24 divisors (see below), whose sum is σ = 104168448. Its totient is φ = 44741808.

The previous prime is 72432103. The next prime is 72432137. The reversal of 72432123 is 32123427.

It is not a de Polignac number, because 72432123 - 2¹⁶ = 72366587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72432093 and 72432102.

It is not an unprimeable number, because it can be changed into a prime (72432103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50190 + ... + 51612.

It is an arithmetic number, because the mean of its divisors is an integer number (4340352).

Almost surely, 2^72432123 is an apocalyptic number.

72432123 is a deficient number, since it is larger than the sum of its proper divisors (31736325).

72432123 is a wasteful number, since it uses less digits than its factorization.

72432123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511 (or 1492 counting only the distinct ones).

The product of its digits is 2016, while the sum is 24.

The square root of 72432123 is about 8510.7063749139. The cubic root of 72432123 is about 416.8473755528.

The spelling of 72432123 in words is "seventy-two million, four hundred thirty-two thousand, one hundred twenty-three".