1105521 has 4 divisors (see below), whose sum is σ = 1474032. Its totient is φ = 737012.

The previous prime is 1105519. The next prime is 1105537. The reversal of 1105521 is 1255011.

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: 1255011 = 3 ⋅418337.

It is a cyclic number.

It is not a de Polignac number, because 1105521 - 2¹ = 1105519 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1105521.

It is not an unprimeable number, because it can be changed into a prime (1105501) 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, 184251 + ... + 184256.

It is an arithmetic number, because the mean of its divisors is an integer number (368508).

2^1105521 is an apocalyptic number.

It is an amenable number.

1105521 is a deficient number, since it is larger than the sum of its proper divisors (368511).

1105521 is an equidigital number, since it uses as much as digits as its factorization.

1105521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368510.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1105521 is about 1051.4375873061. The cubic root of 1105521 is about 103.4004270017.

The spelling of 1105521 in words is "one million, one hundred five thousand, five hundred twenty-one".