1311401412 has 18 divisors (see below), whose sum is σ = 3314931438. Its totient is φ = 437133792.

The previous prime is 1311401407. The next prime is 1311401423. The reversal of 1311401412 is 2141041131.

It can be written as a sum of positive squares in only one way, i.e., 670602816 + 640798596 = 25896^2 + 25314^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18213873 + ... + 18213944.

Almost surely, 2^1311401412 is an apocalyptic number.

1311401412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311401412 is an abundant number, since it is smaller than the sum of its proper divisors (2003530026).

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

1311401412 is a wasteful number, since it uses less digits than its factorization.

1311401412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36427827 (or 36427822 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1311401412 is about 36213.2767365783. The cubic root of 1311401412 is about 1094.5742211512.

Adding to 1311401412 its reverse (2141041131), we get a palindrome (3452442543).

The spelling of 1311401412 in words is "one billion, three hundred eleven million, four hundred one thousand, four hundred twelve".