1058786521 has 9 divisors (see below), whose sum is σ = 1146954879. Its totient is φ = 976950936.

The previous prime is 1058786489. The next prime is 1058786527. The reversal of 1058786521 is 1256878501.

The square root of 1058786521 is 32539.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 156625225 + 902161296 = 12515^2 + 30036^2 .

It is not a de Polignac number, because 1058786521 - 2⁵ = 1058786489 is a prime.

It is a super-2 number, since 2×1058786521² = 2242057794102566882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1058786527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 421756 + ... + 424258.

It is an arithmetic number, because the mean of its divisors is an integer number (127439431).

Almost surely, 2^1058786521 is an apocalyptic number.

1058786521 is the 32539-th square number.

1058786521 is the 16270-th centered octagonal number.

It is an amenable number.

1058786521 is a deficient number, since it is larger than the sum of its proper divisors (88168358).

1058786521 is an frugal number, since it uses more digits than its factorization.

1058786521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032 (or 2516 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The cubic root of 1058786521 is about 1019.2235924880.

The spelling of 1058786521 in words is "one billion, fifty-eight million, seven hundred eighty-six thousand, five hundred twenty-one".