1121530 has 8 divisors (see below), whose sum is σ = 2018772. Its totient is φ = 448608.

The previous prime is 1121509. The next prime is 1121539. The reversal of 1121530 is 351211.

It can be written as a sum of positive squares in 2 ways, for example, as 1121481 + 49 = 1059^2 + 7^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1121530.

It is not an unprimeable number, because it can be changed into a prime (1121539) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 56067 + ... + 56086.

2^1121530 is an apocalyptic number.

1121530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121530 is a deficient number, since it is larger than the sum of its proper divisors (897242).

1121530 is a wasteful number, since it uses less digits than its factorization.

1121530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112160.

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

The square root of 1121530 is about 1059.0231347804. The cubic root of 1121530 is about 103.8971493056.

Adding to 1121530 its reverse (351211), we get a palindrome (1472741).

The spelling of 1121530 in words is "one million, one hundred twenty-one thousand, five hundred thirty".