1101945 has 16 divisors (see below), whose sum is σ = 1899072. Its totient is φ = 542400.

The previous prime is 1101941. The next prime is 1101959. The reversal of 1101945 is 5491011.

It is not a de Polignac number, because 1101945 - 2² = 1101941 is a prime.

It is an Ulam number.

1101945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1101941) 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, 2631 + ... + 3020.

It is an arithmetic number, because the mean of its divisors is an integer number (118692).

2^1101945 is an apocalyptic number.

1101945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1101945 is a deficient number, since it is larger than the sum of its proper divisors (797127).

1101945 is a wasteful number, since it uses less digits than its factorization.

1101945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1101945 is about 1049.7356810169. The cubic root of 1101945 is about 103.2888176853.

Adding to 1101945 its reverse (5491011), we get a palindrome (6592956).

The spelling of 1101945 in words is "one million, one hundred one thousand, nine hundred forty-five".