12851591 has 2 divisors, whose sum is σ = 12851592. Its totient is φ = 12851590.

The previous prime is 12851569. The next prime is 12851593. The reversal of 12851591 is 19515821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12851591 is a prime.

Together with 12851593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12851593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6425795 + 6425796.

It is an arithmetic number, because the mean of its divisors is an integer number (6425796).

Almost surely, 2^12851591 is an apocalyptic number.

12851591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12851591 is an equidigital number, since it uses as much as digits as its factorization.

12851591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 32.

The square root of 12851591 is about 3584.9115749206. The cubic root of 12851591 is about 234.2352748453.

The spelling of 12851591 in words is "twelve million, eight hundred fifty-one thousand, five hundred ninety-one".