12530742685 has 4 divisors (see below), whose sum is σ = 15036891228. Its totient is φ = 10024594144.

The previous prime is 12530742683. The next prime is 12530742739. The reversal of 12530742685 is 58624703521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58624703521 = 43397 ⋅1350893.

It can be written as a sum of positive squares in 2 ways, for example, as 6932560644 + 5598182041 = 83262^2 + 74821^2 .

It is a cyclic number.

It is not a de Polignac number, because 12530742685 - 2¹ = 12530742683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12530742683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253074264 + ... + 1253074273.

It is an arithmetic number, because the mean of its divisors is an integer number (3759222807).

Almost surely, 2^12530742685 is an apocalyptic number.

It is an amenable number.

12530742685 is a deficient number, since it is larger than the sum of its proper divisors (2506148543).

12530742685 is an equidigital number, since it uses as much as digits as its factorization.

12530742685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506148542.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 12530742685 in words is "twelve billion, five hundred thirty million, seven hundred forty-two thousand, six hundred eighty-five".