1310261620 has 12 divisors (see below), whose sum is σ = 2751549444. Its totient is φ = 524104640.

The previous prime is 1310261611. The next prime is 1310261627. The reversal of 1310261620 is 261620131.

It can be written as a sum of positive squares in 2 ways, for example, as 370716516 + 939545104 = 19254^2 + 30652^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1310261591 and 1310261600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310261627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32756521 + ... + 32756560.

It is an arithmetic number, because the mean of its divisors is an integer number (229295787).

Almost surely, 2^1310261620 is an apocalyptic number.

1310261620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1310261620 is an abundant number, since it is smaller than the sum of its proper divisors (1441287824).

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

1310261620 is a wasteful number, since it uses less digits than its factorization.

1310261620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65513090 (or 65513088 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1310261620 is about 36197.5361039947. The cubic root of 1310261620 is about 1094.2570163282.

Adding to 1310261620 its reverse (261620131), we get a palindrome (1571881751).

The spelling of 1310261620 in words is "one billion, three hundred ten million, two hundred sixty-one thousand, six hundred twenty".