12690261 has 12 divisors (see below), whose sum is σ = 18415488. Its totient is φ = 8420904.

The previous prime is 12690259. The next prime is 12690263. The reversal of 12690261 is 16209621.

It is an interprime number because it is at equal distance from previous prime (12690259) and next prime (12690263).

It is not a de Polignac number, because 12690261 - 2¹ = 12690259 is a prime.

It is a super-2 number, since 2×12690261² = 322085448496242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690263) 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, 1155 + ... + 5168.

It is an arithmetic number, because the mean of its divisors is an integer number (1534624).

Almost surely, 2^12690261 is an apocalyptic number.

It is an amenable number.

12690261 is a deficient number, since it is larger than the sum of its proper divisors (5725227).

12690261 is a wasteful number, since it uses less digits than its factorization.

12690261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6552 (or 6549 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12690261 is about 3562.3392595316. The cubic root of 12690261 is about 233.2510020187.

Adding to 12690261 its reverse (16209621), we get a palindrome (28899882).

The spelling of 12690261 in words is "twelve million, six hundred ninety thousand, two hundred sixty-one".