1922521 has 4 divisors (see below), whose sum is σ = 1936692. Its totient is φ = 1908352.

The previous prime is 1922519. The next prime is 1922533. The reversal of 1922521 is 1252291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1252291 = 271 ⋅4621.

It can be written as a sum of positive squares in 2 ways, for example, as 632025 + 1290496 = 795^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1922521 - 2¹ = 1922519 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1922492 and 1922501.

It is not an unprimeable number, because it can be changed into a prime (1922551) 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, 6880 + ... + 7153.

It is an arithmetic number, because the mean of its divisors is an integer number (484173).

2^1922521 is an apocalyptic number.

It is an amenable number.

1922521 is a deficient number, since it is larger than the sum of its proper divisors (14171).

1922521 is a wasteful number, since it uses less digits than its factorization.

1922521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14170.

The product of its digits is 360, while the sum is 22.

The square root of 1922521 is about 1386.5500351592. The cubic root of 1922521 is about 124.3436745937.

The spelling of 1922521 in words is "one million, nine hundred twenty-two thousand, five hundred twenty-one".