12469778 has 4 divisors (see below), whose sum is σ = 18704670. Its totient is φ = 6234888.

The previous prime is 12469771. The next prime is 12469799. The reversal of 12469778 is 87796421.

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

It can be written as a sum of positive squares in only one way, i.e., 12369289 + 100489 = 3517^2 + 317^2 .

It is not an unprimeable number, because it can be changed into a prime (12469771) 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 as a sum of consecutive naturals, namely, 3117443 + ... + 3117446.

Almost surely, 2^12469778 is an apocalyptic number.

12469778 is a deficient number, since it is larger than the sum of its proper divisors (6234892).

12469778 is an equidigital number, since it uses as much as digits as its factorization.

12469778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234891.

The product of its digits is 169344, while the sum is 44.

The square root of 12469778 is about 3531.2572831783. The cubic root of 12469778 is about 231.8922532770.

The spelling of 12469778 in words is "twelve million, four hundred sixty-nine thousand, seven hundred seventy-eight".