1103551 has 8 divisors (see below), whose sum is σ = 1140800. Its totient is φ = 1067040.

The previous prime is 1103549. The next prime is 1103561. The reversal of 1103551 is 1553011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1103551 - 2¹ = 1103549 is a prime.

It is the 1051-st Hogben number.

It is a Duffinian number.

1103551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103561) by changing a digit.

It is a nontrivial repunit in base 1050.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4705 + ... + 4933.

It is an arithmetic number, because the mean of its divisors is an integer number (142600).

2^1103551 is an apocalyptic number.

1103551 is a deficient number, since it is larger than the sum of its proper divisors (37249).

1103551 is an equidigital number, since it uses as much as digits as its factorization.

1103551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 1103551 is about 1050.5003569728. The cubic root of 1103551 is about 103.3389718278.

Adding to 1103551 its reverse (1553011), we get a palindrome (2656562).

It can be divided in two parts, 1103 and 551, that multiplied together give a triangular number (607753 = T₁₁₀₂).

The spelling of 1103551 in words is "one million, one hundred three thousand, five hundred fifty-one".