1300005126 has 80 divisors (see below), whose sum is σ = 3473927424. Its totient is φ = 355273776.

The previous prime is 1300005121. The next prime is 1300005143. The reversal of 1300005126 is 6215000031.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1300005099 and 1300005108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300005121) 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 39 ways as a sum of consecutive naturals, for example, 1161 + ... + 51003.

Almost surely, 2^1300005126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1300005126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736963712).

1300005126 is an abundant number, since it is smaller than the sum of its proper divisors (2173922298).

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

1300005126 is a wasteful number, since it uses less digits than its factorization.

1300005126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49887 (or 49878 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1300005126 is about 36055.5838394000. The cubic root of 1300005126 is about 1091.3943175413.

Adding to 1300005126 its reverse (6215000031), we get a palindrome (7515005157).

The spelling of 1300005126 in words is "one billion, three hundred million, five thousand, one hundred twenty-six".