4151971 has 2 divisors, whose sum is σ = 4151972. Its totient is φ = 4151970.

The previous prime is 4151969. The next prime is 4151977. The reversal of 4151971 is 1791514.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4151971 - 2¹ = 4151969 is a prime.

Together with 4151969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4151977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2075985 + 2075986.

It is an arithmetic number, because the mean of its divisors is an integer number (2075986).

Almost surely, 2^4151971 is an apocalyptic number.

4151971 is a deficient number, since it is larger than the sum of its proper divisors (1).

4151971 is an equidigital number, since it uses as much as digits as its factorization.

4151971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 28.

The square root of 4151971 is about 2037.6385842440. The cubic root of 4151971 is about 160.7254944516.

The spelling of 4151971 in words is "four million, one hundred fifty-one thousand, nine hundred seventy-one".