12547274521 has 8 divisors (see below), whose sum is σ = 12971641088. Its totient is φ = 12124134000.

The previous prime is 12547274477. The next prime is 12547274527.

12547274521 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12547274521 - 2⁷ = 12547274393 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12547274527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285675 + ... + 326656.

It is an arithmetic number, because the mean of its divisors is an integer number (1621455136).

Almost surely, 2^12547274521 is an apocalyptic number.

It is an amenable number.

12547274521 is a deficient number, since it is larger than the sum of its proper divisors (424366567).

12547274521 is an equidigital number, since it uses as much as digits as its factorization.

12547274521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613023.

The product of its digits is 156800, while the sum is 40.

The spelling of 12547274521 in words is "twelve billion, five hundred forty-seven million, two hundred seventy-four thousand, five hundred twenty-one".