1313104021 has 8 divisors (see below), whose sum is σ = 1438288920. Its totient is φ = 1193246208.

The previous prime is 1313103997. The next prime is 1313104027. The reversal of 1313104021 is 1204013131.

It can be written as a sum of positive squares in 4 ways, for example, as 590247025 + 722856996 = 24295^2 + 26886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1313104021 - 2¹¹ = 1313101973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313103986 and 1313104004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313104027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331256 + ... + 1332241.

It is an arithmetic number, because the mean of its divisors is an integer number (179786115).

Almost surely, 2^1313104021 is an apocalyptic number.

It is an amenable number.

1313104021 is a deficient number, since it is larger than the sum of its proper divisors (125184899).

1313104021 is a wasteful number, since it uses less digits than its factorization.

1313104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663543.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1313104021 is about 36236.7771883759. Note that the first 3 decimals coincide. The cubic root of 1313104021 is about 1095.0477161362.

Adding to 1313104021 its reverse (1204013131), we get a palindrome (2517117152).

The spelling of 1313104021 in words is "one billion, three hundred thirteen million, one hundred four thousand, twenty-one".