1540534771 has 2 divisors, whose sum is σ = 1540534772. Its totient is φ = 1540534770.

The previous prime is 1540534741. The next prime is 1540534799. The reversal of 1540534771 is 1774350451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540534771 - 2²³ = 1532146163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1540534771.

It is not a weakly prime, because it can be changed into another prime (1540534741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770267385 + 770267386.

It is an arithmetic number, because the mean of its divisors is an integer number (770267386).

Almost surely, 2^1540534771 is an apocalyptic number.

1540534771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540534771 is an equidigital number, since it uses as much as digits as its factorization.

1540534771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 1540534771 is about 39249.6467627417. The cubic root of 1540534771 is about 1154.9340044624.

It can be divided in two parts, 15405 and 34771, that added together give a square (50176 = 224²).

The spelling of 1540534771 in words is "one billion, five hundred forty million, five hundred thirty-four thousand, seven hundred seventy-one".