12625578 has 64 divisors (see below), whose sum is σ = 32440320. Its totient is φ = 3565296.

The previous prime is 12625573. The next prime is 12625583. The reversal of 12625578 is 87552621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12625573) and next prime (12625583).

It is not an unprimeable number, because it can be changed into a prime (12625573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47875 + ... + 48137.

It is an arithmetic number, because the mean of its divisors is an integer number (506880).

Almost surely, 2^12625578 is an apocalyptic number.

12625578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12625578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16220160).

12625578 is an abundant number, since it is smaller than the sum of its proper divisors (19814742).

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

12625578 is a wasteful number, since it uses less digits than its factorization.

12625578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 402 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 12625578 is about 3553.2489358332. The cubic root of 12625578 is about 232.8540288033.

It can be divided in two parts, 12625 and 578, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12625578 in words is "twelve million, six hundred twenty-five thousand, five hundred seventy-eight".