1122521 has 4 divisors (see below), whose sum is σ = 1137972. Its totient is φ = 1107072.

The previous prime is 1122491. The next prime is 1122529. The reversal of 1122521 is 1252211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 144400 = 989^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122521 - 2¹⁴ = 1106137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1122496 and 1122505.

It is not an unprimeable number, because it can be changed into a prime (1122529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7616 + ... + 7761.

It is an arithmetic number, because the mean of its divisors is an integer number (284493).

2^1122521 is an apocalyptic number.

It is an amenable number.

1122521 is a deficient number, since it is larger than the sum of its proper divisors (15451).

1122521 is an equidigital number, since it uses as much as digits as its factorization.

1122521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15450.

The product of its digits is 40, while the sum is 14.

The square root of 1122521 is about 1059.4909154872. The cubic root of 1122521 is about 103.9277419673.

Adding to 1122521 its reverse (1252211), we get a palindrome (2374732).

The spelling of 1122521 in words is "one million, one hundred twenty-two thousand, five hundred twenty-one".