12425778 has 16 divisors (see below), whose sum is σ = 27612960. Its totient is φ = 4141908.

The previous prime is 12425771. The next prime is 12425789. The reversal of 12425778 is 87752421.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12425771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115000 + ... + 115107.

It is an arithmetic number, because the mean of its divisors is an integer number (1725810).

Almost surely, 2^12425778 is an apocalyptic number.

12425778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12425778 is an abundant number, since it is smaller than the sum of its proper divisors (15187182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12425778 is a wasteful number, since it uses less digits than its factorization.

12425778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230118 (or 230112 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 12425778 is about 3525.0217020609. The cubic root of 12425778 is about 231.6191855029.

It can be divided in two parts, 12425 and 778, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12425778 in words is "twelve million, four hundred twenty-five thousand, seven hundred seventy-eight".