1242001171 has 2 divisors, whose sum is σ = 1242001172. Its totient is φ = 1242001170.

The previous prime is 1242001133. The next prime is 1242001231. The reversal of 1242001171 is 1711002421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242001171 - 2²⁵ = 1208446739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242002171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621000585 + 621000586.

It is an arithmetic number, because the mean of its divisors is an integer number (621000586).

Almost surely, 2^1242001171 is an apocalyptic number.

1242001171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242001171 is an equidigital number, since it uses as much as digits as its factorization.

1242001171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1242001171 is about 35242.0369870982. The cubic root of 1242001171 is about 1074.9146991267.

Adding to 1242001171 its reverse (1711002421), we get a palindrome (2953003592).

The spelling of 1242001171 in words is "one billion, two hundred forty-two million, one thousand, one hundred seventy-one".