1314128781 has 48 divisors (see below), whose sum is σ = 2371120128. Its totient is φ = 683942400.

The previous prime is 1314128737. The next prime is 1314128813. The reversal of 1314128781 is 1878214131.

It is not a de Polignac number, because 1314128781 - 2¹¹ = 1314126733 is a prime.

It is a super-2 number, since 2×1314128781² = 3453868906105091922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1314128731) 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 47 ways as a sum of consecutive naturals, for example, 13411 + ... + 52991.

It is an arithmetic number, because the mean of its divisors is an integer number (49398336).

Almost surely, 2^1314128781 is an apocalyptic number.

It is an amenable number.

1314128781 is a deficient number, since it is larger than the sum of its proper divisors (1056991347).

1314128781 is a wasteful number, since it uses less digits than its factorization.

1314128781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39642 (or 39639 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 1314128781 is about 36250.9142091617. The cubic root of 1314128781 is about 1095.3325042643.

The spelling of 1314128781 in words is "one billion, three hundred fourteen million, one hundred twenty-eight thousand, seven hundred eighty-one".