1312021853 has 8 divisors (see below), whose sum is σ = 1345921920. Its totient is φ = 1278212320.

The previous prime is 1312021847. The next prime is 1312021859. The reversal of 1312021853 is 3581202131.

It is an interprime number because it is at equal distance from previous prime (1312021847) and next prime (1312021859).

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 1312021853 - 2²⁰ = 1310973277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312021859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7226 + ... + 51732.

It is an arithmetic number, because the mean of its divisors is an integer number (168240240).

Almost surely, 2^1312021853 is an apocalyptic number.

It is an amenable number.

1312021853 is a deficient number, since it is larger than the sum of its proper divisors (33900067).

1312021853 is an equidigital number, since it uses as much as digits as its factorization.

1312021853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45267.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1312021853 is about 36221.8422088110. The cubic root of 1312021853 is about 1094.7468130177.

Adding to 1312021853 its reverse (3581202131), we get a palindrome (4893223984).

The spelling of 1312021853 in words is "one billion, three hundred twelve million, twenty-one thousand, eight hundred fifty-three".