1381305126 has 16 divisors (see below), whose sum is σ = 2769573744. Its totient is φ = 459274464.

The previous prime is 1381305113. The next prime is 1381305151. The reversal of 1381305126 is 6215031831.

It is a super-2 number, since 2×1381305126² = 3816007702227751752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1381305093 and 1381305102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 287565 + ... + 292328.

It is an arithmetic number, because the mean of its divisors is an integer number (173098359).

Almost surely, 2^1381305126 is an apocalyptic number.

1381305126 is an abundant number, since it is smaller than the sum of its proper divisors (1388268618).

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

1381305126 is a wasteful number, since it uses less digits than its factorization.

1381305126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580295.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1381305126 is about 37165.9134961055. The cubic root of 1381305126 is about 1113.6871477768.

Adding to 1381305126 its reverse (6215031831), we get a palindrome (7596336957).

The spelling of 1381305126 in words is "one billion, three hundred eighty-one million, three hundred five thousand, one hundred twenty-six".