7922161 has 4 divisors (see below), whose sum is σ = 8531572. Its totient is φ = 7312752.

The previous prime is 7922149. The next prime is 7922171. The reversal of 7922161 is 1612297.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1612297 = 17 ⋅94841.

It can be written as a sum of positive squares in 2 ways, for example, as 3744225 + 4177936 = 1935^2 + 2044^2 .

It is a cyclic number.

It is not a de Polignac number, because 7922161 - 2⁵ = 7922129 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7922111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304686 + ... + 304711.

It is an arithmetic number, because the mean of its divisors is an integer number (2132893).

Almost surely, 2^7922161 is an apocalyptic number.

It is an amenable number.

7922161 is a deficient number, since it is larger than the sum of its proper divisors (609411).

7922161 is a wasteful number, since it uses less digits than its factorization.

7922161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609410.

The product of its digits is 1512, while the sum is 28.

The square root of 7922161 is about 2814.6333686646. The cubic root of 7922161 is about 199.3492264322.

The spelling of 7922161 in words is "seven million, nine hundred twenty-two thousand, one hundred sixty-one".