1240457171 has 2 divisors, whose sum is σ = 1240457172. Its totient is φ = 1240457170.

The previous prime is 1240457149. The next prime is 1240457201. The reversal of 1240457171 is 1717540421.

It is a weak prime.

It is an emirp because it is prime and its reverse (1717540421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240457171 - 2²⁶ = 1173348307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240457111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620228585 + 620228586.

It is an arithmetic number, because the mean of its divisors is an integer number (620228586).

Almost surely, 2^1240457171 is an apocalyptic number.

1240457171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240457171 is an equidigital number, since it uses as much as digits as its factorization.

1240457171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 1240457171 is about 35220.1245170996. The cubic root of 1240457171 is about 1074.4690858827.

Adding to 1240457171 its reverse (1717540421), we get a palindrome (2957997592).

The spelling of 1240457171 in words is "one billion, two hundred forty million, four hundred fifty-seven thousand, one hundred seventy-one".