1121538 has 16 divisors (see below), whose sum is σ = 2447136. Its totient is φ = 339840.

The previous prime is 1121509. The next prime is 1121539. The reversal of 1121538 is 8351211.

It is a Curzon number.

It is a congruent number.

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 (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8431 + ... + 8562.

It is an arithmetic number, because the mean of its divisors is an integer number (152946).

2^1121538 is an apocalyptic number.

1121538 is an abundant number, since it is smaller than the sum of its proper divisors (1325598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121538 is a wasteful number, since it uses less digits than its factorization.

1121538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17009.

The product of its digits is 240, while the sum is 21.

The square root of 1121538 is about 1059.0269118394. The cubic root of 1121538 is about 103.8973963417.

Adding to 1121538 its reverse (8351211), we get a palindrome (9472749).

The spelling of 1121538 in words is "one million, one hundred twenty-one thousand, five hundred thirty-eight".