7722145 has 16 divisors (see below), whose sum is σ = 9596160. Its totient is φ = 5961600.

The previous prime is 7722139. The next prime is 7722163. The reversal of 7722145 is 5412277.

It is not a de Polignac number, because 7722145 - 2⁷ = 7722017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28360 + ... + 28630.

It is an arithmetic number, because the mean of its divisors is an integer number (599760).

Almost surely, 2^7722145 is an apocalyptic number.

It is an amenable number.

7722145 is a deficient number, since it is larger than the sum of its proper divisors (1874015).

7722145 is a wasteful number, since it uses less digits than its factorization.

7722145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its digits is 3920, while the sum is 28.

The square root of 7722145 is about 2778.8747722774. The cubic root of 7722145 is about 197.6572053910.

It can be divided in two parts, 77 and 22145, that added together give a palindrome (22222).

The spelling of 7722145 in words is "seven million, seven hundred twenty-two thousand, one hundred forty-five".