7272181 has 8 divisors (see below), whose sum is σ = 8328320. Its totient is φ = 6220368.

The previous prime is 7272179. The next prime is 7272191. The reversal of 7272181 is 1812727.

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

It is not a de Polignac number, because 7272181 - 2¹ = 7272179 is a prime.

It is a super-2 number, since 2×7272181² = 105769232993522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

7272181 is a modest number, since divided by 2181 gives 727 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4375 + ... + 5803.

It is an arithmetic number, because the mean of its divisors is an integer number (1041040).

Almost surely, 2^7272181 is an apocalyptic number.

It is an amenable number.

7272181 is a deficient number, since it is larger than the sum of its proper divisors (1056139).

7272181 is a wasteful number, since it uses less digits than its factorization.

7272181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163.

The product of its digits is 1568, while the sum is 28.

The square root of 7272181 is about 2696.6981662767. The cubic root of 7272181 is about 193.7410101968.

The spelling of 7272181 in words is "seven million, two hundred seventy-two thousand, one hundred eighty-one".