1520539 has 2 divisors, whose sum is σ = 1520540. Its totient is φ = 1520538.

The previous prime is 1520537. The next prime is 1520543. The reversal of 1520539 is 9350251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1520539 - 2¹ = 1520537 is a prime.

Together with 1520537, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1520537) 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, 760269 + 760270.

It is an arithmetic number, because the mean of its divisors is an integer number (760270).

2^1520539 is an apocalyptic number.

1520539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520539 is an equidigital number, since it uses as much as digits as its factorization.

1520539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 1520539 is about 1233.1013745836. The cubic root of 1520539 is about 114.9915305672.

The spelling of 1520539 in words is "one million, five hundred twenty thousand, five hundred thirty-nine".