1311871652 has 24 divisors (see below), whose sum is σ = 2825570496. Its totient is φ = 518982048.

The previous prime is 1311871643. The next prime is 1311871703. The reversal of 1311871652 is 2561781131.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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, 1801658 + ... + 1802385.

It is an arithmetic number, because the mean of its divisors is an integer number (117732104).

Almost surely, 2^1311871652 is an apocalyptic number.

It is an amenable number.

1311871652 is an abundant number, since it is smaller than the sum of its proper divisors (1513698844).

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

1311871652 is a wasteful number, since it uses less digits than its factorization.

1311871652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604067 (or 3604065 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 1311871652 is about 36219.7688010291. The cubic root of 1311871652 is about 1094.7050356797.

The spelling of 1311871652 in words is "one billion, three hundred eleven million, eight hundred seventy-one thousand, six hundred fifty-two".