1115521 has 4 divisors (see below), whose sum is σ = 1216944. Its totient is φ = 1014100.

The previous prime is 1115519. The next prime is 1115531. The reversal of 1115521 is 1255111.

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.

It is a cyclic number.

It is not a de Polignac number, because 1115521 - 2¹ = 1115519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1115495 and 1115504.

It is not an unprimeable number, because it can be changed into a prime (1115501) 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, 50695 + ... + 50716.

It is an arithmetic number, because the mean of its divisors is an integer number (304236).

2^1115521 is an apocalyptic number.

1115521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1115521 is a deficient number, since it is larger than the sum of its proper divisors (101423).

1115521 is a wasteful number, since it uses less digits than its factorization.

1115521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101422.

The product of its digits is 50, while the sum is 16.

The square root of 1115521 is about 1056.1822759354. The cubic root of 1115521 is about 103.7112614846.

The spelling of 1115521 in words is "one million, one hundred fifteen thousand, five hundred twenty-one".