12571919 has 2 divisors, whose sum is σ = 12571920. Its totient is φ = 12571918.

The previous prime is 12571913. The next prime is 12571921. The reversal of 12571919 is 91917521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12571919 - 2¹² = 12567823 is a prime.

It is a super-2 number, since 2×12571919² = 316106294685122, which contains 22 as substring.

Together with 12571921, 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 (12571913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6285959 + 6285960.

It is an arithmetic number, because the mean of its divisors is an integer number (6285960).

Almost surely, 2^12571919 is an apocalyptic number.

12571919 is a deficient number, since it is larger than the sum of its proper divisors (1).

12571919 is an equidigital number, since it uses as much as digits as its factorization.

12571919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 35.

The square root of 12571919 is about 3545.6902007931. The cubic root of 12571919 is about 232.5236820214.

The spelling of 12571919 in words is "twelve million, five hundred seventy-one thousand, nine hundred nineteen".