72124403 has 16 divisors (see below), whose sum is σ = 79156896. Its totient is φ = 65318400.

The previous prime is 72124391. The next prime is 72124417. The reversal of 72124403 is 30442127.

It is a cyclic number.

It is not a de Polignac number, because 72124403 - 2⁸ = 72124147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72124603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213851 + ... + 214187.

It is an arithmetic number, because the mean of its divisors is an integer number (4947306).

Almost surely, 2^72124403 is an apocalyptic number.

72124403 is a deficient number, since it is larger than the sum of its proper divisors (7032493).

72124403 is a wasteful number, since it uses less digits than its factorization.

72124403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 72124403 is about 8492.6087275937. The cubic root of 72124403 is about 416.2562273655.

It can be divided in two parts, 72124 and 403, that added together give a palindrome (72527).

The spelling of 72124403 in words is "seventy-two million, one hundred twenty-four thousand, four hundred three".