1113553 has 4 divisors (see below), whose sum is σ = 1272640. Its totient is φ = 954468.

The previous prime is 1113527. The next prime is 1113557. The reversal of 1113553 is 3553111.

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: 3553111 = 587 ⋅6053.

It is a cyclic number.

It is not a de Polignac number, because 1113553 - 2⁵ = 1113521 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 1113553.

It is not an unprimeable number, because it can be changed into a prime (1113557) 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, 79533 + ... + 79546.

It is an arithmetic number, because the mean of its divisors is an integer number (318160).

2^1113553 is an apocalyptic number.

It is an amenable number.

1113553 is a deficient number, since it is larger than the sum of its proper divisors (159087).

1113553 is an equidigital number, since it uses as much as digits as its factorization.

1113553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159086.

The product of its digits is 225, while the sum is 19.

The square root of 1113553 is about 1055.2502072968. The cubic root of 1113553 is about 103.6502365146.

Adding to 1113553 its product of digits (225), we get a triangular number (1113778 = T₁₄₉₂).

Adding to 1113553 its reverse (3553111), we get a palindrome (4666664).

The spelling of 1113553 in words is "one million, one hundred thirteen thousand, five hundred fifty-three".