7220845 has 8 divisors (see below), whose sum is σ = 8849664. Its totient is φ = 5653584.

The previous prime is 7220821. The next prime is 7220849. The reversal of 7220845 is 5480227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7220845 - 2²¹ = 5123693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15129 + ... + 15598.

It is an arithmetic number, because the mean of its divisors is an integer number (1106208).

Almost surely, 2^7220845 is an apocalyptic number.

It is an amenable number.

7220845 is a deficient number, since it is larger than the sum of its proper divisors (1628819).

7220845 is a wasteful number, since it uses less digits than its factorization.

7220845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30779.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 7220845 is about 2687.1630021270. The cubic root of 7220845 is about 193.2840457659.

It can be divided in two parts, 7220 and 845, that multiplied together give a square (6100900 = 2470²).

The spelling of 7220845 in words is "seven million, two hundred twenty thousand, eight hundred forty-five".