1240540271 has 2 divisors, whose sum is σ = 1240540272. Its totient is φ = 1240540270.

The previous prime is 1240540261. The next prime is 1240540283. The reversal of 1240540271 is 1720450421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240540271 - 2¹⁴ = 1240523887 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240540271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240540261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620270135 + 620270136.

It is an arithmetic number, because the mean of its divisors is an integer number (620270136).

Almost surely, 2^1240540271 is an apocalyptic number.

1240540271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240540271 is an equidigital number, since it uses as much as digits as its factorization.

1240540271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1240540271 is about 35221.3042205992. The cubic root of 1240540271 is about 1074.4930787539.

Adding to 1240540271 its reverse (1720450421), we get a palindrome (2960990692).

The spelling of 1240540271 in words is "one billion, two hundred forty million, five hundred forty thousand, two hundred seventy-one".