1103655 has 32 divisors (see below), whose sum is σ = 2110464. Its totient is φ = 481536.

The previous prime is 1103639. The next prime is 1103699. The reversal of 1103655 is 5563011.

It is a happy number.

It is not a de Polignac number, because 1103655 - 2⁴ = 1103639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2187 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (65952).

2^1103655 is an apocalyptic number.

1103655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1103655 is a deficient number, since it is larger than the sum of its proper divisors (1006809).

1103655 is a wasteful number, since it uses less digits than its factorization.

1103655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1103655 is about 1050.5498560278. The cubic root of 1103655 is about 103.3422179897.

Adding to 1103655 its reverse (5563011), we get a palindrome (6666666).

The spelling of 1103655 in words is "one million, one hundred three thousand, six hundred fifty-five".