1025216539 has 4 divisors (see below), whose sum is σ = 1025510256. Its totient is φ = 1024922824.

The previous prime is 1025216537. The next prime is 1025216587. The reversal of 1025216539 is 9356125201.

1025216539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1025216539 - 2¹ = 1025216537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025216537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141559 + ... + 148624.

It is an arithmetic number, because the mean of its divisors is an integer number (256377564).

Almost surely, 2^1025216539 is an apocalyptic number.

1025216539 is a deficient number, since it is larger than the sum of its proper divisors (293717).

1025216539 is an equidigital number, since it uses as much as digits as its factorization.

1025216539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293716.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 1025216539 is about 32019.0027795995. The cubic root of 1025216539 is about 1008.3358337999.

The spelling of 1025216539 in words is "one billion, twenty-five million, two hundred sixteen thousand, five hundred thirty-nine".