1264142171 has 2 divisors, whose sum is σ = 1264142172. Its totient is φ = 1264142170.

The previous prime is 1264142153. The next prime is 1264142183. The reversal of 1264142171 is 1712414621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1264142171 - 2²² = 1259947867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264142141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632071085 + 632071086.

It is an arithmetic number, because the mean of its divisors is an integer number (632071086).

Almost surely, 2^1264142171 is an apocalyptic number.

1264142171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264142171 is an equidigital number, since it uses as much as digits as its factorization.

1264142171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 1264142171 is about 35554.7770489424. Note that the first 3 decimals coincide. The cubic root of 1264142171 is about 1081.2645712628.

Adding to 1264142171 its reverse (1712414621), we get a palindrome (2976556792).

The spelling of 1264142171 in words is "one billion, two hundred sixty-four million, one hundred forty-two thousand, one hundred seventy-one".