1522561 has 4 divisors (see below), whose sum is σ = 1543492. Its totient is φ = 1501632.

The previous prime is 1522553. The next prime is 1522579. The reversal of 1522561 is 1652251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652251 = 23 ⋅71837.

It can be written as a sum of positive squares in 2 ways, for example, as 1252161 + 270400 = 1119^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522561 - 2³ = 1522553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1522511) 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, 10356 + ... + 10501.

It is an arithmetic number, because the mean of its divisors is an integer number (385873).

2^1522561 is an apocalyptic number.

It is an amenable number.

1522561 is a deficient number, since it is larger than the sum of its proper divisors (20931).

1522561 is an equidigital number, since it uses as much as digits as its factorization.

1522561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20930.

The product of its digits is 600, while the sum is 22.

The square root of 1522561 is about 1233.9209861251. The cubic root of 1522561 is about 115.0424795807.

The spelling of 1522561 in words is "one million, five hundred twenty-two thousand, five hundred sixty-one".