1922161 has 4 divisors (see below), whose sum is σ = 1954800. Its totient is φ = 1889524.

The previous prime is 1922153. The next prime is 1922209. The reversal of 1922161 is 1612291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1612291 = 61 ⋅26431.

It is a cyclic number.

It is not a de Polignac number, because 1922161 - 2³ = 1922153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1922111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16231 + ... + 16348.

It is an arithmetic number, because the mean of its divisors is an integer number (488700).

2^1922161 is an apocalyptic number.

It is an amenable number.

1922161 is a deficient number, since it is larger than the sum of its proper divisors (32639).

1922161 is an equidigital number, since it uses as much as digits as its factorization.

1922161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32638.

The product of its digits is 216, while the sum is 22.

The square root of 1922161 is about 1386.4202104701. The cubic root of 1922161 is about 124.3359128203.

The spelling of 1922161 in words is "one million, nine hundred twenty-two thousand, one hundred sixty-one".