1540859 has 2 divisors, whose sum is σ = 1540860. Its totient is φ = 1540858.

The previous prime is 1540849. The next prime is 1540867. The reversal of 1540859 is 9580451.

It is a strong prime.

It is an emirp because it is prime and its reverse (9580451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540859 - 2⁸ = 1540603 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1540849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770429 + 770430.

It is an arithmetic number, because the mean of its divisors is an integer number (770430).

2^1540859 is an apocalyptic number.

1540859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540859 is an equidigital number, since it uses as much as digits as its factorization.

1540859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1540859 is about 1241.3134173125. The cubic root of 1540859 is about 115.5015023261.

The spelling of 1540859 in words is "one million, five hundred forty thousand, eight hundred fifty-nine".