1541539 has 2 divisors, whose sum is σ = 1541540. Its totient is φ = 1541538.

The previous prime is 1541513. The next prime is 1541581. The reversal of 1541539 is 9351451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1541539 - 2¹³ = 1533347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1545539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770769 + 770770.

It is an arithmetic number, because the mean of its divisors is an integer number (770770).

2^1541539 is an apocalyptic number.

1541539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541539 is an equidigital number, since it uses as much as digits as its factorization.

1541539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 1541539 is about 1241.5872905277. The cubic root of 1541539 is about 115.5184905711.

It can be divided in two parts, 1541 and 539, that added together give a triangular number (2080 = T₆₄).

The spelling of 1541539 in words is "one million, five hundred forty-one thousand, five hundred thirty-nine".