12268581 has 16 divisors (see below), whose sum is σ = 17762304. Its totient is φ = 7487424.

The previous prime is 12268579. The next prime is 12268583. The reversal of 12268581 is 18586221.

12268581 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

12268581 is a nontrivial binomial coefficient, being equal to C(4954, 2).

It is an interprime number because it is at equal distance from previous prime (12268579) and next prime (12268583).

It is not a de Polignac number, because 12268581 - 2¹ = 12268579 is a prime.

It is a super-2 number, since 2×12268581² = 301036159507122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12268583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3715 + ... + 6191.

It is an arithmetic number, because the mean of its divisors is an integer number (1110144).

Almost surely, 2^12268581 is an apocalyptic number.

12268581 is the 4953-rd triangular number and also the 2477-th hexagonal number.

It is an amenable number.

12268581 is a deficient number, since it is larger than the sum of its proper divisors (5493723).

12268581 is a wasteful number, since it uses less digits than its factorization.

12268581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620.

The product of its digits is 7680, while the sum is 33.

The square root of 12268581 is about 3502.6534227639. The cubic root of 12268581 is about 230.6383088067.

The spelling of 12268581 in words is "twelve million, two hundred sixty-eight thousand, five hundred eighty-one".