1258188881 has 2 divisors, whose sum is σ = 1258188882. Its totient is φ = 1258188880.

The previous prime is 1258188863. The next prime is 1258188907. The reversal of 1258188881 is 1888818521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 888934225 + 369254656 = 29815^2 + 19216^2 .

It is a cyclic number.

It is not a de Polignac number, because 1258188881 - 2¹⁴ = 1258172497 is a prime.

It is a super-2 number, since 2×1258188881² = 3166078520544064322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1258188181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629094440 + 629094441.

It is an arithmetic number, because the mean of its divisors is an integer number (629094441).

Almost surely, 2^1258188881 is an apocalyptic number.

It is an amenable number.

1258188881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258188881 is an equidigital number, since it uses as much as digits as its factorization.

1258188881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 327680, while the sum is 50.

The square root of 1258188881 is about 35470.9582757500. The cubic root of 1258188881 is about 1079.5645481022.

The spelling of 1258188881 in words is "one billion, two hundred fifty-eight million, one hundred eighty-eight thousand, eight hundred eighty-one".