11785491 has 24 divisors (see below), whose sum is σ = 18367440. Its totient is φ = 7261920.

The previous prime is 11785463. The next prime is 11785493. The reversal of 11785491 is 19458711.

It is not a de Polignac number, because 11785491 - 2¹⁵ = 11752723 is a prime.

It is a super-2 number, since 2×11785491² = 277795596222162, which contains 22 as substring.

Its product of digits (10080) is a multiple of the sum of its prime divisors (63).

It is not an unprimeable number, because it can be changed into a prime (11785493) 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 23 ways as a sum of consecutive naturals, for example, 287431 + ... + 287471.

It is an arithmetic number, because the mean of its divisors is an integer number (765310).

Almost surely, 2^11785491 is an apocalyptic number.

11785491 is a deficient number, since it is larger than the sum of its proper divisors (6581949).

11785491 is an frugal number, since it uses more digits than its factorization.

11785491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 63 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 11785491 is about 3433.0002912904. Note that the first 3 decimals coincide. The cubic root of 11785491 is about 227.5704632194.

The spelling of 11785491 in words is "eleven million, seven hundred eighty-five thousand, four hundred ninety-one".