12269531 has 4 divisors (see below), whose sum is σ = 12278064. Its totient is φ = 12261000.

The previous prime is 12269527. The next prime is 12269539. The reversal of 12269531 is 13596221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12269531 - 2² = 12269527 is a prime.

It is a super-2 number, since 2×12269531² = 301082781919922, 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 = 12269494 and 12269503.

It is not an unprimeable number, because it can be changed into a prime (12269539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (3069516).

Almost surely, 2^12269531 is an apocalyptic number.

12269531 is a deficient number, since it is larger than the sum of its proper divisors (8533).

12269531 is an equidigital number, since it uses as much as digits as its factorization.

12269531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532.

The product of its digits is 3240, while the sum is 29.

The square root of 12269531 is about 3502.7890316147. The cubic root of 12269531 is about 230.6442617021.

The spelling of 12269531 in words is "twelve million, two hundred sixty-nine thousand, five hundred thirty-one".