1313021052 has 108 divisors (see below), whose sum is σ = 3994197480. Its totient is φ = 362198592.

The previous prime is 1313021051. The next prime is 1313021053. The reversal of 1313021052 is 2501203131.

It is an interprime number because it is at equal distance from previous prime (1313021051) and next prime (1313021053).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313021051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38323 + ... + 63989.

It is an arithmetic number, because the mean of its divisors is an integer number (36983310).

Almost surely, 2^1313021052 is an apocalyptic number.

1313021052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1313021052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997098740).

1313021052 is an abundant number, since it is smaller than the sum of its proper divisors (2681176428).

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

1313021052 is a wasteful number, since it uses less digits than its factorization.

1313021052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25720 (or 25708 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1313021052 is about 36235.6323526995. The cubic root of 1313021052 is about 1095.0246519752.

Adding to 1313021052 its reverse (2501203131), we get a palindrome (3814224183).

The spelling of 1313021052 in words is "one billion, three hundred thirteen million, twenty-one thousand, fifty-two".