12520551 has 8 divisors (see below), whose sum is σ = 17676144. Its totient is φ = 7856000.

The previous prime is 12520537. The next prime is 12520553. The reversal of 12520551 is 15502521.

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 12520551 - 2¹⁰ = 12519527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520553) 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, 122700 + ... + 122801.

It is an arithmetic number, because the mean of its divisors is an integer number (2209518).

Almost surely, 2^12520551 is an apocalyptic number.

12520551 is a deficient number, since it is larger than the sum of its proper divisors (5155593).

12520551 is a wasteful number, since it uses less digits than its factorization.

12520551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245521.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 12520551 is about 3538.4390626376. The cubic root of 12520551 is about 232.2065577659.

The spelling of 12520551 in words is "twelve million, five hundred twenty thousand, five hundred fifty-one".