1100145 has 16 divisors (see below), whose sum is σ = 1786752. Its totient is φ = 577920.

The previous prime is 1100131. The next prime is 1100147. The reversal of 1100145 is 5410011.

It is a happy number.

It is not a de Polignac number, because 1100145 - 2⁹ = 1099633 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100145.

It is not an unprimeable number, because it can be changed into a prime (1100147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (111672).

2^1100145 is an apocalyptic number.

1100145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1100145 is a deficient number, since it is larger than the sum of its proper divisors (686607).

1100145 is a wasteful number, since it uses less digits than its factorization.

1100145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1100145 is about 1048.8779719300. The cubic root of 1100145 is about 103.2325471226.

Adding to 1100145 its reverse (5410011), we get a palindrome (6510156).

The spelling of 1100145 in words is "one million, one hundred thousand, one hundred forty-five".