12457578 has 64 divisors (see below), whose sum is σ = 30551040. Its totient is φ = 3307392.

The previous prime is 12457537. The next prime is 12457579. The reversal of 12457578 is 87575421.

It is not an unprimeable number, because it can be changed into a prime (12457579) 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 31 ways as a sum of consecutive naturals, for example, 53350 + ... + 53582.

It is an arithmetic number, because the mean of its divisors is an integer number (477360).

Almost surely, 2^12457578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12457578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15275520).

12457578 is an abundant number, since it is smaller than the sum of its proper divisors (18093462).

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

12457578 is a wasteful number, since it uses less digits than its factorization.

12457578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its digits is 78400, while the sum is 39.

The square root of 12457578 is about 3529.5294303915. The cubic root of 12457578 is about 231.8166034774.

The spelling of 12457578 in words is "twelve million, four hundred fifty-seven thousand, five hundred seventy-eight".