12651971 has 2 divisors, whose sum is σ = 12651972. Its totient is φ = 12651970.

The previous prime is 12651953. The next prime is 12651983. The reversal of 12651971 is 17915621.

It is a strong prime.

It is an emirp because it is prime and its reverse (17915621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12651971 - 2⁶ = 12651907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12651941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6325985 + 6325986.

It is an arithmetic number, because the mean of its divisors is an integer number (6325986).

Almost surely, 2^12651971 is an apocalyptic number.

12651971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12651971 is an equidigital number, since it uses as much as digits as its factorization.

12651971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 32.

The square root of 12651971 is about 3556.9609219107. The cubic root of 12651971 is about 233.0161715829.

The spelling of 12651971 in words is "twelve million, six hundred fifty-one thousand, nine hundred seventy-one".