1230564539 has 4 divisors (see below), whose sum is σ = 1232432520. Its totient is φ = 1228696560.

The previous prime is 1230564527. The next prime is 1230564541. The reversal of 1230564539 is 9354650321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1230564539 - 2⁴ = 1230564523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230564509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933002 + ... + 934319.

It is an arithmetic number, because the mean of its divisors is an integer number (308108130).

Almost surely, 2^1230564539 is an apocalyptic number.

1230564539 is a deficient number, since it is larger than the sum of its proper divisors (1867981).

1230564539 is an equidigital number, since it uses as much as digits as its factorization.

1230564539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867980.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 1230564539 is about 35079.4033444128. The cubic root of 1230564539 is about 1071.6051661315.

The spelling of 1230564539 in words is "one billion, two hundred thirty million, five hundred sixty-four thousand, five hundred thirty-nine".