1106391 has 16 divisors (see below), whose sum is σ = 1733760. Its totient is φ = 618720.

The previous prime is 1106381. The next prime is 1106401. The reversal of 1106391 is 1936011.

1106391 = T₄₄₃ + T₄₄₄ + ... + T₄₅₃.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1106381) and next prime (1106401).

It is not a de Polignac number, because 1106391 - 2⁹ = 1105879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1106311) 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, 861 + ... + 1718.

It is an arithmetic number, because the mean of its divisors is an integer number (108360).

2^1106391 is an apocalyptic number.

1106391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1106391 is a deficient number, since it is larger than the sum of its proper divisors (627369).

1106391 is a wasteful number, since it uses less digits than its factorization.

1106391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1106391 is about 1051.8512252215. The cubic root of 1106391 is about 103.4275438645.

The spelling of 1106391 in words is "one million, one hundred six thousand, three hundred ninety-one".