12520578 has 48 divisors (see below), whose sum is σ = 29942784. Its totient is φ = 3477600.

The previous prime is 12520553. The next prime is 12520597. The reversal of 12520578 is 87502521.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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 in 23 ways as a sum of consecutive naturals, for example, 10303 + ... + 11453.

It is an arithmetic number, because the mean of its divisors is an integer number (623808).

Almost surely, 2^12520578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12520578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14971392).

12520578 is an abundant number, since it is smaller than the sum of its proper divisors (17422206).

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

12520578 is a wasteful number, since it uses less digits than its factorization.

12520578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207 (or 1200 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 12520578 is about 3538.4428778772. The cubic root of 12520578 is about 232.2067246801.

It can be divided in two parts, 125205 and 78, that multiplied together give a triangular number (9765990 = T₄₄₁₉).

The spelling of 12520578 in words is "twelve million, five hundred twenty thousand, five hundred seventy-eight".