1258125820 has 48 divisors (see below), whose sum is σ = 3089737728. Its totient is φ = 421323840.

The previous prime is 1258125811. The next prime is 1258125833. The reversal of 1258125820 is 285218521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98476 + ... + 110515.

It is an arithmetic number, because the mean of its divisors is an integer number (64369536).

Almost surely, 2^1258125820 is an apocalyptic number.

1258125820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258125820 is an abundant number, since it is smaller than the sum of its proper divisors (1831611908).

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

1258125820 is a wasteful number, since it uses less digits than its factorization.

1258125820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209050 (or 209048 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 1258125820 is about 35470.0693543162. The cubic root of 1258125820 is about 1079.5465117118.

The spelling of 1258125820 in words is "one billion, two hundred fifty-eight million, one hundred twenty-five thousand, eight hundred twenty".