1121505 has 32 divisors (see below), whose sum is σ = 2239488.
Its totient is φ = 465600.
The previous prime is 1121453. The next prime is 1121509. The reversal of 1121505 is 5051211.
Adding to 1121505 its reverse (5051211), we get a palindrome (6172716).
It is not a de Polignac number, because 1121505 - 27 = 1121377 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (15).
It is a partition number, being equal to the number of ways a set of 61 identical objects can be partitioned into subset.
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 31 ways as a sum of consecutive naturals, for example, 670 + ... + 1640.
It is an arithmetic number, because the mean of its divisors is an integer number (69984).
21121505 is an apocalyptic number.
1121505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
1121505 is a deficient number, since it is larger than the sum of its proper divisors (1117983).
1121505 is a wasteful number, since it uses less digits than its factorization.
1121505 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 997.
The product of its (nonzero) digits is 50, while the sum is 15.
The square root of 1121505 is about 1059.0113313841.
The cubic root of 1121505 is about 103.8963773102.
The spelling of 1121505 in words is "one million, one hundred twenty-one thousand, five hundred five".