1311401166 has 32 divisors (see below), whose sum is σ = 2880887040. Its totient is φ = 396120384.

The previous prime is 1311401159. The next prime is 1311401171. The reversal of 1311401166 is 6611041131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247455 + ... + 252698.

It is an arithmetic number, because the mean of its divisors is an integer number (90027720).

Almost surely, 2^1311401166 is an apocalyptic number.

1311401166 is an abundant number, since it is smaller than the sum of its proper divisors (1569485874).

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

1311401166 is a wasteful number, since it uses less digits than its factorization.

1311401166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500200.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1311401166 is about 36213.2733400338. The cubic root of 1311401166 is about 1094.5741527090.

Adding to 1311401166 its reverse (6611041131), we get a palindrome (7922442297).

The spelling of 1311401166 in words is "one billion, three hundred eleven million, four hundred one thousand, one hundred sixty-six".