1258682891 has 2 divisors, whose sum is σ = 1258682892. Its totient is φ = 1258682890.

The previous prime is 1258682881. The next prime is 1258682897. The reversal of 1258682891 is 1982868521.

It is a strong prime.

It is an emirp because it is prime and its reverse (1982868521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1258682891 - 2¹⁸ = 1258420747 is a prime.

It is a super-2 number, since 2×1258682891² = 3168565240192235762, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1258682897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629341445 + 629341446.

It is an arithmetic number, because the mean of its divisors is an integer number (629341446).

Almost surely, 2^1258682891 is an apocalyptic number.

1258682891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258682891 is an equidigital number, since it uses as much as digits as its factorization.

1258682891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 50.

The square root of 1258682891 is about 35477.9211764162. The cubic root of 1258682891 is about 1079.7058215114.

The spelling of 1258682891 in words is "one billion, two hundred fifty-eight million, six hundred eighty-two thousand, eight hundred ninety-one".