12505745 has 16 divisors (see below), whose sum is σ = 17322240. Its totient is φ = 8489664.

The previous prime is 12505723. The next prime is 12505747. The reversal of 12505745 is 54750521.

It is a cyclic number.

It is not a de Polignac number, because 12505745 - 2⁶ = 12505681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12505747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1871 + ... + 5339.

It is an arithmetic number, because the mean of its divisors is an integer number (1082640).

Almost surely, 2^12505745 is an apocalyptic number.

It is an amenable number.

12505745 is a deficient number, since it is larger than the sum of its proper divisors (4816495).

12505745 is a wasteful number, since it uses less digits than its factorization.

12505745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 12505745 is about 3536.3462782935. The cubic root of 12505745 is about 232.1149908055.

The spelling of 12505745 in words is "twelve million, five hundred five thousand, seven hundred forty-five".