72106771 has 8 divisors (see below), whose sum is σ = 82082304. Its totient is φ = 62701320.

The previous prime is 72106757. The next prime is 72106781. The reversal of 72106771 is 17760127.

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

It is not a de Polignac number, because 72106771 - 2⁹ = 72106259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72106711) 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, 142251 + ... + 142756.

It is an arithmetic number, because the mean of its divisors is an integer number (10260288).

Almost surely, 2^72106771 is an apocalyptic number.

72106771 is a deficient number, since it is larger than the sum of its proper divisors (9975533).

72106771 is a wasteful number, since it uses less digits than its factorization.

72106771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285041.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 72106771 is about 8491.5705849978. The cubic root of 72106771 is about 416.2223043674. Note that the first 3 decimals are identical.

Adding to 72106771 its reverse (17760127), we get a palindrome (89866898).

The spelling of 72106771 in words is "seventy-two million, one hundred six thousand, seven hundred seventy-one".