1313001020 has 24 divisors (see below), whose sum is σ = 2762805024. Its totient is φ = 524152256.

The previous prime is 1313000999. The next prime is 1313001043. The reversal of 1313001020 is 201003131.

It is a junction number, because it is equal to n+sod(n) for n = 1313000992 and 1313001010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55199 + ... + 75318.

It is an arithmetic number, because the mean of its divisors is an integer number (115116876).

Almost surely, 2^1313001020 is an apocalyptic number.

1313001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313001020 is an abundant number, since it is smaller than the sum of its proper divisors (1449804004).

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

1313001020 is a wasteful number, since it uses less digits than its factorization.

1313001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131029 (or 131027 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1313001020 is about 36235.3559386409. The cubic root of 1313001020 is about 1095.0190832284.

Adding to 1313001020 its reverse (201003131), we get a palindrome (1514004151).

The spelling of 1313001020 in words is "one billion, three hundred thirteen million, one thousand, twenty".