12547985 has 4 divisors (see below), whose sum is σ = 15057588. Its totient is φ = 10038384.

The previous prime is 12547957. The next prime is 12547991. The reversal of 12547985 is 58974521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58974521 = 313 ⋅188417.

It can be written as a sum of positive squares in 2 ways, for example, as 5870929 + 6677056 = 2423^2 + 2584^2 .

It is a cyclic number.

It is not a de Polignac number, because 12547985 - 2⁸ = 12547729 is a prime.

It is a Duffinian number.

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, 1254794 + ... + 1254803.

It is an arithmetic number, because the mean of its divisors is an integer number (3764397).

Almost surely, 2^12547985 is an apocalyptic number.

It is an amenable number.

12547985 is a deficient number, since it is larger than the sum of its proper divisors (2509603).

12547985 is an equidigital number, since it uses as much as digits as its factorization.

12547985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509602.

The product of its digits is 100800, while the sum is 41.

The square root of 12547985 is about 3542.3135095584. The cubic root of 12547985 is about 232.3760313412.

The spelling of 12547985 in words is "twelve million, five hundred forty-seven thousand, nine hundred eighty-five".