7272409 has 2 divisors, whose sum is σ = 7272410. Its totient is φ = 7272408.

The previous prime is 7272373. The next prime is 7272427. The reversal of 7272409 is 9042727.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6906384 + 366025 = 2628^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 7272409 - 2⁹ = 7271897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7272449) 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 as a sum of consecutive naturals, namely, 3636204 + 3636205.

It is an arithmetic number, because the mean of its divisors is an integer number (3636205).

Almost surely, 2^7272409 is an apocalyptic number.

It is an amenable number.

7272409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7272409 is an equidigital number, since it uses as much as digits as its factorization.

7272409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 7272409 is about 2696.7404398644. The cubic root of 7272409 is about 193.7430349213.

It can be divided in two parts, 727 and 2409, that added together give a square (3136 = 56²).

The spelling of 7272409 in words is "seven million, two hundred seventy-two thousand, four hundred nine".