1540559 has 2 divisors, whose sum is σ = 1540560. Its totient is φ = 1540558.

The previous prime is 1540543. The next prime is 1540573. The reversal of 1540559 is 9550451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540559 - 2⁴ = 1540543 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770279 + 770280.

It is an arithmetic number, because the mean of its divisors is an integer number (770280).

2^1540559 is an apocalyptic number.

1540559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540559 is an equidigital number, since it uses as much as digits as its factorization.

1540559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1540559 is about 1241.1925716826. The cubic root of 1540559 is about 115.4940059232.

The spelling of 1540559 in words is "one million, five hundred forty thousand, five hundred fifty-nine".