11381559 has 16 divisors (see below), whose sum is σ = 17767680. Its totient is φ = 6344640.

The previous prime is 11381537. The next prime is 11381561. The reversal of 11381559 is 95518311.

It is not a de Polignac number, because 11381559 - 2⁷ = 11381431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381059) 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, 5749 + ... + 7470.

It is an arithmetic number, because the mean of its divisors is an integer number (1110480).

Almost surely, 2^11381559 is an apocalyptic number.

11381559 is a deficient number, since it is larger than the sum of its proper divisors (6386121).

11381559 is a wasteful number, since it uses less digits than its factorization.

11381559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13270.

The product of its digits is 5400, while the sum is 33.

The square root of 11381559 is about 3373.6566215310. The cubic root of 11381559 is about 224.9402903287.

The spelling of 11381559 in words is "eleven million, three hundred eighty-one thousand, five hundred fifty-nine".