12642269 has 4 divisors (see below), whose sum is σ = 12651744. Its totient is φ = 12632796.

The previous prime is 12642263. The next prime is 12642281. The reversal of 12642269 is 96224621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96224621 = 337 ⋅285533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12642269 is a prime.

It is a super-2 number, since 2×12642269² = 319653930936722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642263) 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, 2327 + ... + 5540.

It is an arithmetic number, because the mean of its divisors is an integer number (3162936).

Almost surely, 2^12642269 is an apocalyptic number.

It is an amenable number.

12642269 is a deficient number, since it is larger than the sum of its proper divisors (9475).

12642269 is an equidigital number, since it uses as much as digits as its factorization.

12642269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474.

The product of its digits is 10368, while the sum is 32.

The square root of 12642269 is about 3555.5968556629. The cubic root of 12642269 is about 232.9565945412.

The spelling of 12642269 in words is "twelve million, six hundred forty-two thousand, two hundred sixty-nine".