12521487 has 8 divisors (see below), whose sum is σ = 18213120. Its totient is φ = 7588760.

The previous prime is 12521479. The next prime is 12521501. The reversal of 12521487 is 78412521.

12521487 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12521487 - 2³ = 12521479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189687 + ... + 189752.

It is an arithmetic number, because the mean of its divisors is an integer number (2276640).

Almost surely, 2^12521487 is an apocalyptic number.

12521487 is a deficient number, since it is larger than the sum of its proper divisors (5691633).

12521487 is a wasteful number, since it uses less digits than its factorization.

12521487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379453.

The product of its digits is 4480, while the sum is 30.

The square root of 12521487 is about 3538.5713218755. The cubic root of 12521487 is about 232.2123439841.

It can be divided in two parts, 125 and 21487, that added together give a palindrome (21612).

The spelling of 12521487 in words is "twelve million, five hundred twenty-one thousand, four hundred eighty-seven".