1381312026 has 12 divisors (see below), whose sum is σ = 2992842762. Its totient is φ = 460437336.

The previous prime is 1381312007. The next prime is 1381312061. The reversal of 1381312026 is 6202131831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1313990001 + 67322025 = 36249^2 + 8205^2 .

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 5 ways as a sum of consecutive naturals, for example, 38369761 + ... + 38369796.

Almost surely, 2^1381312026 is an apocalyptic number.

1381312026 is an abundant number, since it is smaller than the sum of its proper divisors (1611530736).

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

1381312026 is a wasteful number, since it uses less digits than its factorization.

1381312026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76739565 (or 76739562 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1381312026 is about 37166.0063229828. The cubic root of 1381312026 is about 1113.6890021652.

Adding to 1381312026 its reverse (6202131831), we get a palindrome (7583443857).

The spelling of 1381312026 in words is "one billion, three hundred eighty-one million, three hundred twelve thousand, twenty-six".