72124103 has 4 divisors (see below), whose sum is σ = 72247560. Its totient is φ = 72000648.

The previous prime is 72124069. The next prime is 72124109. The reversal of 72124103 is 30142127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30142127 = 71 ⋅424537.

It is a cyclic number.

It is not a de Polignac number, because 72124103 - 2⁸ = 72123847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72124109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60848 + ... + 62021.

It is an arithmetic number, because the mean of its divisors is an integer number (18061890).

Almost surely, 2^72124103 is an apocalyptic number.

72124103 is a deficient number, since it is larger than the sum of its proper divisors (123457).

72124103 is a wasteful number, since it uses less digits than its factorization.

72124103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123456.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 72124103 is about 8492.5910651579. The cubic root of 72124103 is about 416.2556502283.

It can be divided in two parts, 72124 and 103, that added together give a palindrome (72227).

The spelling of 72124103 in words is "seventy-two million, one hundred twenty-four thousand, one hundred three".