12547252291 has 4 divisors (see below), whose sum is σ = 14339716912. Its totient is φ = 10754787672.

The previous prime is 12547252283. The next prime is 12547252297. The reversal of 12547252291 is 19225274521.

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

It is a cyclic number.

It is not a de Polignac number, because 12547252291 - 2³ = 12547252283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12547252297) 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, 896232300 + ... + 896232313.

It is an arithmetic number, because the mean of its divisors is an integer number (3584929228).

Almost surely, 2^12547252291 is an apocalyptic number.

12547252291 is a deficient number, since it is larger than the sum of its proper divisors (1792464621).

12547252291 is an equidigital number, since it uses as much as digits as its factorization.

12547252291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792464620.

The product of its digits is 100800, while the sum is 40.

The spelling of 12547252291 in words is "twelve billion, five hundred forty-seven million, two hundred fifty-two thousand, two hundred ninety-one".