7272385 has 4 divisors (see below), whose sum is σ = 8726868. Its totient is φ = 5817904.

The previous prime is 7272373. The next prime is 7272409. The reversal of 7272385 is 5832727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5832727 = 269 ⋅21683.

It can be written as a sum of positive squares in 2 ways, for example, as 2782224 + 4490161 = 1668^2 + 2119^2 .

It is a cyclic number.

It is not a de Polignac number, because 7272385 - 2⁷ = 7272257 is a prime.

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

It is a Duffinian number.

7272385 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7272385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727234 + ... + 727243.

It is an arithmetic number, because the mean of its divisors is an integer number (2181717).

Almost surely, 2^7272385 is an apocalyptic number.

It is an amenable number.

7272385 is a deficient number, since it is larger than the sum of its proper divisors (1454483).

7272385 is a wasteful number, since it uses less digits than its factorization.

7272385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454482.

The product of its digits is 23520, while the sum is 34.

The square root of 7272385 is about 2696.7359900443. The cubic root of 7272385 is about 193.7428217944.

The spelling of 7272385 in words is "seven million, two hundred seventy-two thousand, three hundred eighty-five".