12091536 has 30 divisors (see below), whose sum is σ = 33839910. Its totient is φ = 4030464.

The previous prime is 12091517. The next prime is 12091559. The reversal of 12091536 is 63519021.

12091536 is a `hidden beast` number, since 120 + 9 + 1 + 536 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11861136 + 230400 = 3444^2 + 480^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41841 + ... + 42128.

It is an arithmetic number, because the mean of its divisors is an integer number (1127997).

Almost surely, 2^12091536 is an apocalyptic number.

12091536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12091536 is an abundant number, since it is smaller than the sum of its proper divisors (21748374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12091536 is a wasteful number, since it uses less digits than its factorization.

12091536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83983 (or 83974 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 12091536 is about 3477.2885988943. The cubic root of 12091536 is about 229.5234999503.

The spelling of 12091536 in words is "twelve million, ninety-one thousand, five hundred thirty-six".