12345091 has 4 divisors (see below), whose sum is σ = 13467384. Its totient is φ = 11222800.

The previous prime is 12345083. The next prime is 12345121. The reversal of 12345091 is 19054321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12345091 - 2³ = 12345083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12345001) 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 3 ways as a sum of consecutive naturals, for example, 561130 + ... + 561151.

It is an arithmetic number, because the mean of its divisors is an integer number (3366846).

Almost surely, 2^12345091 is an apocalyptic number.

12345091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12345091 is a deficient number, since it is larger than the sum of its proper divisors (1122293).

12345091 is a wasteful number, since it uses less digits than its factorization.

12345091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122292.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12345091 is about 3513.5581680115. The cubic root of 12345091 is about 231.1167553804.

The spelling of 12345091 in words is "twelve million, three hundred forty-five thousand, ninety-one".