72126111 has 8 divisors (see below), whose sum is σ = 96902784. Its totient is φ = 47716760.

The previous prime is 72126107. The next prime is 72126133. The reversal of 72126111 is 11162127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72126111 - 2² = 72126107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72126101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91371 + ... + 92156.

It is an arithmetic number, because the mean of its divisors is an integer number (12112848).

Almost surely, 2^72126111 is an apocalyptic number.

72126111 is a deficient number, since it is larger than the sum of its proper divisors (24776673).

72126111 is a wasteful number, since it uses less digits than its factorization.

72126111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183661.

The product of its digits is 168, while the sum is 21.

The square root of 72126111 is about 8492.7092850280. The cubic root of 72126111 is about 416.2595131698.

Adding to 72126111 its reverse (11162127), we get a palindrome (83288238).

The spelling of 72126111 in words is "seventy-two million, one hundred twenty-six thousand, one hundred eleven".