1313652121 has 8 divisors (see below), whose sum is σ = 1363246920. Its totient is φ = 1264343808.

The previous prime is 1313652113. The next prime is 1313652139. The reversal of 1313652121 is 1212563131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 219365721 + 1094286400 = 14811^2 + 33080^2 .

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 1313652121 - 2³ = 1313652113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313655121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62256 + ... + 80641.

It is an arithmetic number, because the mean of its divisors is an integer number (170405865).

Almost surely, 2^1313652121 is an apocalyptic number.

It is an amenable number.

1313652121 is a deficient number, since it is larger than the sum of its proper divisors (49594799).

1313652121 is a wasteful number, since it uses less digits than its factorization.

1313652121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143243.

The product of its digits is 1080, while the sum is 25.

The square root of 1313652121 is about 36244.3391579982. The cubic root of 1313652121 is about 1095.2000554670.

The spelling of 1313652121 in words is "one billion, three hundred thirteen million, six hundred fifty-two thousand, one hundred twenty-one".