12826665 has 24 divisors (see below), whose sum is σ = 22393800. Its totient is φ = 6791424.

The previous prime is 12826651. The next prime is 12826669. The reversal of 12826665 is 56662821.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 11614464 = 1101^2 + 3408^2 .

It is not a de Polignac number, because 12826665 - 2¹³ = 12818473 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12826669) 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 23 ways as a sum of consecutive naturals, for example, 5749 + ... + 7661.

It is an arithmetic number, because the mean of its divisors is an integer number (933075).

Almost surely, 2^12826665 is an apocalyptic number.

12826665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12826665 is a deficient number, since it is larger than the sum of its proper divisors (9567135).

12826665 is a wasteful number, since it uses less digits than its factorization.

12826665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073 (or 2070 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 12826665 is about 3581.4333722687. The cubic root of 12826665 is about 234.0837416692.

The spelling of 12826665 in words is "twelve million, eight hundred twenty-six thousand, six hundred sixty-five".