1258165049 has 2 divisors, whose sum is σ = 1258165050. Its totient is φ = 1258165048.

The previous prime is 1258165031. The next prime is 1258165063. The reversal of 1258165049 is 9405618521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1186458025 + 71707024 = 34445^2 + 8468^2 .

It is a cyclic number.

It is not a de Polignac number, because 1258165049 - 2²⁸ = 989729593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1258164997 and 1258165015.

It is not a weakly prime, because it can be changed into another prime (1258165099) 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 as a sum of consecutive naturals, namely, 629082524 + 629082525.

It is an arithmetic number, because the mean of its divisors is an integer number (629082525).

Almost surely, 2^1258165049 is an apocalyptic number.

It is an amenable number.

1258165049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258165049 is an equidigital number, since it uses as much as digits as its factorization.

1258165049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 1258165049 is about 35470.6223373653. The cubic root of 1258165049 is about 1079.5577318641.

The spelling of 1258165049 in words is "one billion, two hundred fifty-eight million, one hundred sixty-five thousand, forty-nine".