1311356452 has 48 divisors (see below), whose sum is σ = 2718576000. Its totient is φ = 541545984.

The previous prime is 1311356443. The next prime is 1311356491. The reversal of 1311356452 is 2546531131.

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, 501324 + ... + 503932.

It is an arithmetic number, because the mean of its divisors is an integer number (56637000).

Almost surely, 2^1311356452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311356452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1359288000).

1311356452 is an abundant number, since it is smaller than the sum of its proper divisors (1407219548).

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

1311356452 is a wasteful number, since it uses less digits than its factorization.

1311356452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268 (or 3266 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 1311356452 is about 36212.6559644553. The cubic root of 1311356452 is about 1094.5617122379.

Adding to 1311356452 its reverse (2546531131), we get a palindrome (3857887583).

The spelling of 1311356452 in words is "one billion, three hundred eleven million, three hundred fifty-six thousand, four hundred fifty-two".