7272405 has 24 divisors (see below), whose sum is σ = 14406912. Its totient is φ = 3324384.

The previous prime is 7272373. The next prime is 7272409. The reversal of 7272405 is 5042727.

It is not a de Polignac number, because 7272405 - 2⁵ = 7272373 is a prime.

7272405 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272409) 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 23 ways as a sum of consecutive naturals, for example, 11229 + ... + 11858.

It is an arithmetic number, because the mean of its divisors is an integer number (600288).

Almost surely, 2^7272405 is an apocalyptic number.

It is an amenable number.

7272405 is a deficient number, since it is larger than the sum of its proper divisors (7134507).

7272405 is a wasteful number, since it uses less digits than its factorization.

7272405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23105 (or 23102 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 7272405 is about 2696.7396982282. The cubic root of 7272405 is about 193.7429994002.

The spelling of 7272405 in words is "seven million, two hundred seventy-two thousand, four hundred five".