1922561 has 2 divisors, whose sum is σ = 1922562. Its totient is φ = 1922560.

The previous prime is 1922551. The next prime is 1922563. The reversal of 1922561 is 1652291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1874161 + 48400 = 1369^2 + 220^2 .

It is an emirp because it is prime and its reverse (1652291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1922561 - 2¹⁰ = 1921537 is a prime.

It is a Sophie Germain prime.

Together with 1922563, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1922561.

It is not a weakly prime, because it can be changed into another prime (1922563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961280 + 961281.

It is an arithmetic number, because the mean of its divisors is an integer number (961281).

2^1922561 is an apocalyptic number.

It is an amenable number.

1922561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1922561 is an equidigital number, since it uses as much as digits as its factorization.

1922561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 1922561 is about 1386.5644593743. The cubic root of 1922561 is about 124.3445369532.

The spelling of 1922561 in words is "one million, nine hundred twenty-two thousand, five hundred sixty-one".