12521386 has 8 divisors (see below), whose sum is σ = 18857664. Its totient is φ = 6235500.

The previous prime is 12521381. The next prime is 12521447. The reversal of 12521386 is 68312521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12521381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11970 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (2357208).

Almost surely, 2^12521386 is an apocalyptic number.

12521386 is a deficient number, since it is larger than the sum of its proper divisors (6336278).

12521386 is a wasteful number, since it uses less digits than its factorization.

12521386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25196.

The product of its digits is 2880, while the sum is 28.

The square root of 12521386 is about 3538.5570505504. The cubic root of 12521386 is about 232.2117196305.

The spelling of 12521386 in words is "twelve million, five hundred twenty-one thousand, three hundred eighty-six".