1058812721 has 2 divisors, whose sum is σ = 1058812722. Its totient is φ = 1058812720.

The previous prime is 1058812687. The next prime is 1058812739. The reversal of 1058812721 is 1272188501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 873852721 + 184960000 = 29561^2 + 13600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1058812721 is a prime.

It is a super-2 number, since 2×1058812721² = 2242168756302847682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1058812021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 529406360 + 529406361.

It is an arithmetic number, because the mean of its divisors is an integer number (529406361).

Almost surely, 2^1058812721 is an apocalyptic number.

It is an amenable number.

1058812721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1058812721 is an equidigital number, since it uses as much as digits as its factorization.

1058812721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 1058812721 is about 32539.4025913200. The cubic root of 1058812721 is about 1019.2319994197.

The spelling of 1058812721 in words is "one billion, fifty-eight million, eight hundred twelve thousand, seven hundred twenty-one".