1311020432 has 20 divisors (see below), whose sum is σ = 2574900300. Its totient is φ = 646530048.

The previous prime is 1311020407. The next prime is 1311020471. The reversal of 1311020432 is 2340201131.

It can be written as a sum of positive squares in 2 ways, for example, as 875213056 + 435807376 = 29584^2 + 20876^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1311020432.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560057 + ... + 562392.

It is an arithmetic number, because the mean of its divisors is an integer number (128745015).

Almost surely, 2^1311020432 is an apocalyptic number.

It is an amenable number.

1311020432 is a deficient number, since it is larger than the sum of its proper divisors (1263879868).

1311020432 is a wasteful number, since it uses less digits than its factorization.

1311020432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122530 (or 1122524 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1311020432 is about 36208.0161290287. The cubic root of 1311020432 is about 1094.4682146373.

Adding to 1311020432 its reverse (2340201131), we get a palindrome (3651221563).

The spelling of 1311020432 in words is "one billion, three hundred eleven million, twenty thousand, four hundred thirty-two".