12521887 has 8 divisors (see below), whose sum is σ = 14333472. Its totient is φ = 10716000.

The previous prime is 12521863. The next prime is 12521891. The reversal of 12521887 is 78812521.

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 12521887 - 2¹⁵ = 12489119 is a prime.

It is a super-3 number, since 3×12521887³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521837) 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, 5637 + ... + 7537.

It is an arithmetic number, because the mean of its divisors is an integer number (1791684).

Almost surely, 2^12521887 is an apocalyptic number.

12521887 is a deficient number, since it is larger than the sum of its proper divisors (1811585).

12521887 is an equidigital number, since it uses as much as digits as its factorization.

12521887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849.

The product of its digits is 8960, while the sum is 34.

The square root of 12521887 is about 3538.6278414097. The cubic root of 12521887 is about 232.2148166390.

The spelling of 12521887 in words is "twelve million, five hundred twenty-one thousand, eight hundred eighty-seven".