1103553 has 24 divisors (see below), whose sum is σ = 1774656. Its totient is φ = 655200.

The previous prime is 1103549. The next prime is 1103561. The reversal of 1103553 is 3553011.

It is a happy number.

1103553 is a `hidden beast` number, since 110 + 3 + 553 = 666.

It is not a de Polignac number, because 1103553 - 2² = 1103549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1103533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6951 + ... + 7107.

It is an arithmetic number, because the mean of its divisors is an integer number (73944).

2^1103553 is an apocalyptic number.

It is an amenable number.

1103553 is a deficient number, since it is larger than the sum of its proper divisors (671103).

1103553 is a wasteful number, since it uses less digits than its factorization.

1103553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 1103553 is about 1050.5013088997. The cubic root of 1103553 is about 103.3390342559.

Adding to 1103553 its reverse (3553011), we get a palindrome (4656564).

It can be divided in two parts, 110 and 3553, that added together give a palindrome (3663).

The spelling of 1103553 in words is "one million, one hundred three thousand, five hundred fifty-three".