258542709 has 16 divisors (see below), whose sum is σ = 366266880. Its totient is φ = 161760240.

The previous prime is 258542707. The next prime is 258542741. The reversal of 258542709 is 907245852.

It is not a de Polignac number, because 258542709 - 2¹ = 258542707 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258542707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15097 + ... + 27294.

It is an arithmetic number, because the mean of its divisors is an integer number (22891680).

Almost surely, 2^258542709 is an apocalyptic number.

It is an amenable number.

258542709 is a deficient number, since it is larger than the sum of its proper divisors (107724171).

258542709 is a wasteful number, since it uses less digits than its factorization.

258542709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42520.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 258542709 is about 16079.2633226774. The cubic root of 258542709 is about 637.0557378401.

The spelling of 258542709 in words is "two hundred fifty-eight million, five hundred forty-two thousand, seven hundred nine".