11815485 has 32 divisors (see below), whose sum is σ = 20856960. Its totient is φ = 5664000.

The previous prime is 11815481. The next prime is 11815487. The reversal of 11815485 is 58451811.

11815485 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11815485 - 2² = 11815481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11815481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16311 + ... + 17019.

It is an arithmetic number, because the mean of its divisors is an integer number (651780).

Almost surely, 2^11815485 is an apocalyptic number.

11815485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11815485 is a deficient number, since it is larger than the sum of its proper divisors (9041475).

11815485 is a wasteful number, since it uses less digits than its factorization.

11815485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its digits is 6400, while the sum is 33.

The square root of 11815485 is about 3437.3659973881. The cubic root of 11815485 is about 227.7633548053.

It can be divided in two parts, 1181 and 5485, that added together give a palindrome (6666).

The spelling of 11815485 in words is "eleven million, eight hundred fifteen thousand, four hundred eighty-five".