1121145 has 16 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 583040.

The previous prime is 1121143. The next prime is 1121147. The reversal of 1121145 is 5411211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1121143) and next prime (1121147).

It is not a de Polignac number, because 1121145 - 2¹ = 1121143 is a prime.

It is a super-2 number, since 2×1121145² = 2513932222050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121143) 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 15 ways as a sum of consecutive naturals, for example, 297 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^1121145 is an apocalyptic number.

1121145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121145 is a deficient number, since it is larger than the sum of its proper divisors (717447).

1121145 is a wasteful number, since it uses less digits than its factorization.

1121145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 40, while the sum is 15.

The square root of 1121145 is about 1058.8413478893. The cubic root of 1121145 is about 103.8852593040.

Adding to 1121145 its reverse (5411211), we get a palindrome (6532356).

The spelling of 1121145 in words is "one million, one hundred twenty-one thousand, one hundred forty-five".