12528745 has 8 divisors (see below), whose sum is σ = 15918984. Its totient is φ = 9433344.

The previous prime is 12528713. The next prime is 12528749. The reversal of 12528745 is 54782521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3790809 + 8737936 = 1947^2 + 2956^2 .

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 12528745 - 2⁵ = 12528713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12528745.

It is not an unprimeable number, because it can be changed into a prime (12528749) 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, 73614 + ... + 73783.

It is an arithmetic number, because the mean of its divisors is an integer number (1989873).

Almost surely, 2^12528745 is an apocalyptic number.

It is an amenable number.

12528745 is a deficient number, since it is larger than the sum of its proper divisors (3390239).

12528745 is a wasteful number, since it uses less digits than its factorization.

12528745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147419.

The product of its digits is 22400, while the sum is 34.

The square root of 12528745 is about 3539.5967284424. The cubic root of 12528745 is about 232.2572021189.

It can be divided in two parts, 12528 and 745, that multiplied together give a triangular number (9333360 = T₄₃₂₀).

The spelling of 12528745 in words is "twelve million, five hundred twenty-eight thousand, seven hundred forty-five".