1258271999 has 8 divisors (see below), whose sum is σ = 1277526432. Its totient is φ = 1239153120.

The previous prime is 1258271969. The next prime is 1258272007. The reversal of 1258271999 is 9991728521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1258271999 - 2¹⁶ = 1258206463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1258271999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258271909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15104 + ... + 52389.

It is an arithmetic number, because the mean of its divisors is an integer number (159690804).

Almost surely, 2^1258271999 is an apocalyptic number.

1258271999 is a deficient number, since it is larger than the sum of its proper divisors (19254433).

1258271999 is a wasteful number, since it uses less digits than its factorization.

1258271999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67777.

The product of its digits is 816480, while the sum is 53.

The square root of 1258271999 is about 35472.1298909440. The cubic root of 1258271999 is about 1079.5883201742.

The spelling of 1258271999 in words is "one billion, two hundred fifty-eight million, two hundred seventy-one thousand, nine hundred ninety-nine".