12354581 has 4 divisors (see below), whose sum is σ = 12362700. Its totient is φ = 12346464.

The previous prime is 12354547. The next prime is 12354613. The reversal of 12354581 is 18545321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8614225 + 3740356 = 2935^2 + 1934^2 .

It is a cyclic number.

It is not a de Polignac number, because 12354581 - 2¹⁰ = 12353557 is a prime.

It is a super-2 number, since 2×12354581² = 305271343371122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12354521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (3090675).

Almost surely, 2^12354581 is an apocalyptic number.

It is an amenable number.

12354581 is a deficient number, since it is larger than the sum of its proper divisors (8119).

12354581 is an equidigital number, since it uses as much as digits as its factorization.

12354581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8118.

The product of its digits is 4800, while the sum is 29.

The square root of 12354581 is about 3514.9083914094. The cubic root of 12354581 is about 231.1759620786.

The spelling of 12354581 in words is "twelve million, three hundred fifty-four thousand, five hundred eighty-one".