12684722 has 4 divisors (see below), whose sum is σ = 19027086. Its totient is φ = 6342360.

The previous prime is 12684713. The next prime is 12684731. The reversal of 12684722 is 22748621.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12684713) and next prime (12684731).

It can be written as a sum of positive squares in only one way, i.e., 10699441 + 1985281 = 3271^2 + 1409^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3171179 + ... + 3171182.

Almost surely, 2^12684722 is an apocalyptic number.

12684722 is a deficient number, since it is larger than the sum of its proper divisors (6342364).

12684722 is an equidigital number, since it uses as much as digits as its factorization.

12684722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342363.

The product of its digits is 10752, while the sum is 32.

The square root of 12684722 is about 3561.5617360927. The cubic root of 12684722 is about 233.2170608907.

It can be divided in two parts, 126 and 84722, that added together give a palindrome (84848).

The spelling of 12684722 in words is "twelve million, six hundred eighty-four thousand, seven hundred twenty-two".