7272645 has 16 divisors (see below), whose sum is σ = 11724480. Its totient is φ = 3849344.

The previous prime is 7272641. The next prime is 7272647. The reversal of 7272645 is 5462727.

It is a cyclic number.

It is not a de Polignac number, because 7272645 - 2² = 7272641 is a prime.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286 + ... + 3824.

It is an arithmetic number, because the mean of its divisors is an integer number (732780).

Almost surely, 2^7272645 is an apocalyptic number.

It is an amenable number.

7272645 is a deficient number, since it is larger than the sum of its proper divisors (4451835).

7272645 is a wasteful number, since it uses less digits than its factorization.

7272645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684.

The product of its digits is 23520, while the sum is 33.

The square root of 7272645 is about 2696.7841960379. The cubic root of 7272645 is about 193.7451306442.

It can be divided in two parts, 72726 and 45, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 7272645 in words is "seven million, two hundred seventy-two thousand, six hundred forty-five".