1258128126 has 48 divisors (see below), whose sum is σ = 2830673664. Its totient is φ = 418817304.

The previous prime is 1258128103. The next prime is 1258128133. The reversal of 1258128126 is 6218218521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 534885 + ... + 537231.

It is an arithmetic number, because the mean of its divisors is an integer number (58972368).

Almost surely, 2^1258128126 is an apocalyptic number.

1258128126 is an abundant number, since it is smaller than the sum of its proper divisors (1572545538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1258128126 is a wasteful number, since it uses less digits than its factorization.

1258128126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3467 (or 3455 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 1258128126 is about 35470.1018605811. The cubic root of 1258128126 is about 1079.5471712730.

The spelling of 1258128126 in words is "one billion, two hundred fifty-eight million, one hundred twenty-eight thousand, one hundred twenty-six".