72120741 has 16 divisors (see below), whose sum is σ = 119889408. Its totient is φ = 37465200.

The previous prime is 72120739. The next prime is 72120793. The reversal of 72120741 is 14702127.

It is not a de Polignac number, because 72120741 - 2¹ = 72120739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72120721) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 155875 + ... + 156336.

It is an arithmetic number, because the mean of its divisors is an integer number (7493088).

Almost surely, 2^72120741 is an apocalyptic number.

It is an amenable number.

72120741 is a deficient number, since it is larger than the sum of its proper divisors (47768667).

72120741 is a wasteful number, since it uses less digits than its factorization.

72120741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312232.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 72120741 is about 8492.3931256154. The cubic root of 72120741 is about 416.2491823339.

Adding to 72120741 its reverse (14702127), we get a palindrome (86822868).

The spelling of 72120741 in words is "seventy-two million, one hundred twenty thousand, seven hundred forty-one".