11381765 has 8 divisors (see below), whose sum is σ = 13812120. Its totient is φ = 9002752.

The previous prime is 11381761. The next prime is 11381813. The reversal of 11381765 is 56718311.

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 11175649 = 454^2 + 3343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11381765 - 2² = 11381761 is a prime.

It is a super-3 number, since 3×11381765³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381761) 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 7 ways as a sum of consecutive naturals, for example, 12344 + ... + 13233.

It is an arithmetic number, because the mean of its divisors is an integer number (1726515).

Almost surely, 2^11381765 is an apocalyptic number.

It is an amenable number.

11381765 is a deficient number, since it is larger than the sum of its proper divisors (2430355).

11381765 is an equidigital number, since it uses as much as digits as its factorization.

11381765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25671.

The product of its digits is 5040, while the sum is 32.

The square root of 11381765 is about 3373.6871520637. The cubic root of 11381765 is about 224.9416474193.

The spelling of 11381765 in words is "eleven million, three hundred eighty-one thousand, seven hundred sixty-five".