12861533 has 4 divisors (see below), whose sum is σ = 13209180. Its totient is φ = 12513888.

The previous prime is 12861517. The next prime is 12861553. The reversal of 12861533 is 33516821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33516821 = 13 ⋅2578217.

It can be written as a sum of positive squares in 2 ways, for example, as 9375844 + 3485689 = 3062^2 + 1867^2 .

It is a cyclic number.

It is not a de Polignac number, because 12861533 - 2⁴ = 12861517 is a prime.

It is a super-2 number, since 2×12861533² = 330838062220178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12861496 and 12861505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861553) 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, 173768 + ... + 173841.

It is an arithmetic number, because the mean of its divisors is an integer number (3302295).

Almost surely, 2^12861533 is an apocalyptic number.

It is an amenable number.

12861533 is a deficient number, since it is larger than the sum of its proper divisors (347647).

12861533 is an equidigital number, since it uses as much as digits as its factorization.

12861533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347646.

The product of its digits is 4320, while the sum is 29.

The square root of 12861533 is about 3586.2979519276. The cubic root of 12861533 is about 234.2956608019.

The spelling of 12861533 in words is "twelve million, eight hundred sixty-one thousand, five hundred thirty-three".