12662869 has 2 divisors, whose sum is σ = 12662870. Its totient is φ = 12662868.

The previous prime is 12662861. The next prime is 12662887. The reversal of 12662869 is 96826621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 2067844 = 3255^2 + 1438^2 .

It is a cyclic number.

It is not a de Polignac number, because 12662869 - 2³ = 12662861 is a prime.

It is a super-2 number, since 2×12662869² = 320696502622322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12662861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331434 + 6331435.

It is an arithmetic number, because the mean of its divisors is an integer number (6331435).

Almost surely, 2^12662869 is an apocalyptic number.

It is an amenable number.

12662869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12662869 is an equidigital number, since it uses as much as digits as its factorization.

12662869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 12662869 is about 3558.4925179070. The cubic root of 12662869 is about 233.0830565888.

It can be divided in two parts, 12662 and 869, that added together give a palindrome (13531).

The spelling of 12662869 in words is "twelve million, six hundred sixty-two thousand, eight hundred sixty-nine".