12528722 has 4 divisors (see below), whose sum is σ = 18793086. Its totient is φ = 6264360.

The previous prime is 12528713. The next prime is 12528749. The reversal of 12528722 is 22782521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22782521 = 2131 ⋅10691.

It can be written as a sum of positive squares in only one way, i.e., 12327121 + 201601 = 3511^2 + 449^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3132179 + ... + 3132182.

Almost surely, 2^12528722 is an apocalyptic number.

12528722 is a deficient number, since it is larger than the sum of its proper divisors (6264364).

12528722 is an equidigital number, since it uses as much as digits as its factorization.

12528722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6264363.

The product of its digits is 4480, while the sum is 29.

The square root of 12528722 is about 3539.5934794832. The cubic root of 12528722 is about 232.2570599946.

The spelling of 12528722 in words is "twelve million, five hundred twenty-eight thousand, seven hundred twenty-two".