12103785 has 12 divisors (see below), whose sum is σ = 20979972. Its totient is φ = 6455328.

The previous prime is 12103783. The next prime is 12103787. The reversal of 12103785 is 58730121.

It is an interprime number because it is at equal distance from previous prime (12103783) and next prime (12103787).

It can be written as a sum of positive squares in 2 ways, for example, as 2518569 + 9585216 = 1587^2 + 3096^2 .

It is not a de Polignac number, because 12103785 - 2¹ = 12103783 is a prime.

It is a super-2 number, since 2×12103785² = 293003222652450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12103781) 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 11 ways as a sum of consecutive naturals, for example, 134442 + ... + 134531.

It is an arithmetic number, because the mean of its divisors is an integer number (1748331).

Almost surely, 2^12103785 is an apocalyptic number.

12103785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12103785 is a deficient number, since it is larger than the sum of its proper divisors (8876187).

12103785 is a wasteful number, since it uses less digits than its factorization.

12103785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268984 (or 268981 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12103785 is about 3479.0494391428. The cubic root of 12103785 is about 229.6009779629.

The spelling of 12103785 in words is "twelve million, one hundred three thousand, seven hundred eighty-five".