1116521 has 4 divisors (see below), whose sum is σ = 1276032. Its totient is φ = 957012.

The previous prime is 1116499. The next prime is 1116523. The reversal of 1116521 is 1256111.

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: 1256111 = 73 ⋅17207.

It is not a de Polignac number, because 1116521 - 2¹⁰ = 1115497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1116521.

It is not an unprimeable number, because it can be changed into a prime (1116523) 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, 79745 + ... + 79758.

It is an arithmetic number, because the mean of its divisors is an integer number (319008).

2^1116521 is an apocalyptic number.

It is an amenable number.

1116521 is a deficient number, since it is larger than the sum of its proper divisors (159511).

1116521 is an equidigital number, since it uses as much as digits as its factorization.

1116521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159510.

The product of its digits is 60, while the sum is 17.

The square root of 1116521 is about 1056.6555730227. The cubic root of 1116521 is about 103.7422426096.

The spelling of 1116521 in words is "one million, one hundred sixteen thousand, five hundred twenty-one".