1230268581 has 10 divisors (see below), whose sum is σ = 1837808742. Its totient is φ = 820179000.

The previous prime is 1230268561. The next prime is 1230268583. The reversal of 1230268581 is 1858620321.

It is a happy number.

1230268581 is a `hidden beast` number, since 12 + 3 + 0 + 2 + 68 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1215637956 + 14630625 = 34866^2 + 3825^2 .

It is not a de Polignac number, because 1230268581 - 2⁵ = 1230268549 is a prime.

It is a super-2 number, since 2×1230268581² = 3027121562791507122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230268583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7594170 + ... + 7594331.

Almost surely, 2^1230268581 is an apocalyptic number.

It is an amenable number.

1230268581 is a deficient number, since it is larger than the sum of its proper divisors (607540161).

1230268581 is an equidigital number, since it uses as much as digits as its factorization.

1230268581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15188513 (or 15188504 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1230268581 is about 35075.1846894639. The cubic root of 1230268581 is about 1071.5192501310.

The spelling of 1230268581 in words is "one billion, two hundred thirty million, two hundred sixty-eight thousand, five hundred eighty-one".