12530545 has 4 divisors (see below), whose sum is σ = 15036660. Its totient is φ = 10024432.

The previous prime is 12530521. The next prime is 12530569. The reversal of 12530545 is 54503521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54503521 = 2953 ⋅18457.

It is an interprime number because it is at equal distance from previous prime (12530521) and next prime (12530569).

It can be written as a sum of positive squares in 2 ways, for example, as 8625969 + 3904576 = 2937^2 + 1976^2 .

It is a cyclic number.

It is not a de Polignac number, because 12530545 - 2²³ = 4141937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253050 + ... + 1253059.

It is an arithmetic number, because the mean of its divisors is an integer number (3759165).

Almost surely, 2^12530545 is an apocalyptic number.

It is an amenable number.

12530545 is a deficient number, since it is larger than the sum of its proper divisors (2506115).

12530545 is an equidigital number, since it uses as much as digits as its factorization.

12530545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506114.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 12530545 is about 3539.8509855642. The cubic root of 12530545 is about 232.2683243541.

The spelling of 12530545 in words is "twelve million, five hundred thirty thousand, five hundred forty-five".