11381573 has 12 divisors (see below), whose sum is σ = 13816800. Its totient is φ = 9330552.

The previous prime is 11381561. The next prime is 11381581. The reversal of 11381573 is 37518311.

11381573 = 202² + 203² + ... + 348².

It is not a de Polignac number, because 11381573 - 2⁸ = 11381317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3923 + ... + 6176.

It is an arithmetic number, because the mean of its divisors is an integer number (1151400).

Almost surely, 2^11381573 is an apocalyptic number.

It is an amenable number.

11381573 is a deficient number, since it is larger than the sum of its proper divisors (2435227).

11381573 is a wasteful number, since it uses less digits than its factorization.

11381573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10136 (or 10129 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 11381573 is about 3373.6586964303. The cubic root of 11381573 is about 224.9403825587.

Adding to 11381573 its reverse (37518311), we get a palindrome (48899884).

The spelling of 11381573 in words is "eleven million, three hundred eighty-one thousand, five hundred seventy-three".