12454921147 has 4 divisors (see below), whose sum is σ = 12744570520. Its totient is φ = 12165271776.

The previous prime is 12454921103. The next prime is 12454921169. The reversal of 12454921147 is 74112945421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12454921147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12454921187) 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, 144824622 + ... + 144824707.

It is an arithmetic number, because the mean of its divisors is an integer number (3186142630).

Almost surely, 2^12454921147 is an apocalyptic number.

12454921147 is a deficient number, since it is larger than the sum of its proper divisors (289649373).

12454921147 is an equidigital number, since it uses as much as digits as its factorization.

12454921147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289649372.

The product of its digits is 80640, while the sum is 40.

The spelling of 12454921147 in words is "twelve billion, four hundred fifty-four million, nine hundred twenty-one thousand, one hundred forty-seven".