7272581 has 2 divisors, whose sum is σ = 7272582. Its totient is φ = 7272580.

The previous prime is 7272563. The next prime is 7272593. The reversal of 7272581 is 1852727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 36481 = 2690^2 + 191^2 .

It is an emirp because it is prime and its reverse (1852727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7272581 - 2¹⁰ = 7271557 is a prime.

It is a super-2 number, since 2×7272581² = 105780868803122, which contains 22 as substring.

It is a Sophie Germain prime.

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

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7272511) 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 as a sum of consecutive naturals, namely, 3636290 + 3636291.

It is an arithmetic number, because the mean of its divisors is an integer number (3636291).

Almost surely, 2^7272581 is an apocalyptic number.

It is an amenable number.

7272581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7272581 is an equidigital number, since it uses as much as digits as its factorization.

7272581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 32.

The square root of 7272581 is about 2696.7723300271. The cubic root of 7272581 is about 193.7445623170.

The spelling of 7272581 in words is "seven million, two hundred seventy-two thousand, five hundred eighty-one".