1121503 has 4 divisors (see below), whose sum is σ = 1170288. Its totient is φ = 1072720.

The previous prime is 1121453. The next prime is 1121509. The reversal of 1121503 is 3051211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3051211 = 17 ⋅179483.

It is a de Polignac number, because none of the positive numbers 2^k-1121503 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121509) 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, 24358 + ... + 24403.

It is an arithmetic number, because the mean of its divisors is an integer number (292572).

2^1121503 is an apocalyptic number.

1121503 is a deficient number, since it is larger than the sum of its proper divisors (48785).

1121503 is an equidigital number, since it uses as much as digits as its factorization.

1121503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48784.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1121503 is about 1059.0103871068. The cubic root of 1121503 is about 103.8963155501.

Adding to 1121503 its reverse (3051211), we get a palindrome (4172714).

The spelling of 1121503 in words is "one million, one hundred twenty-one thousand, five hundred three".