1258226279 has 2 divisors, whose sum is σ = 1258226280. Its totient is φ = 1258226278.

The previous prime is 1258226257. The next prime is 1258226309. The reversal of 1258226279 is 9726228521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1258226279 - 2²⁰ = 1257177703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1258226209) 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, 629113139 + 629113140.

It is an arithmetic number, because the mean of its divisors is an integer number (629113140).

Almost surely, 2^1258226279 is an apocalyptic number.

1258226279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258226279 is an equidigital number, since it uses as much as digits as its factorization.

1258226279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 1258226279 is about 35471.4854354875. The cubic root of 1258226279 is about 1079.5752442055.

The spelling of 1258226279 in words is "one billion, two hundred fifty-eight million, two hundred twenty-six thousand, two hundred seventy-nine".