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1321472321 = 13101651717
BaseRepresentation
bin100111011000100…
…0001000101000001
310102002120202020022
41032301001011001
510201244103241
6335043423225
744514220661
oct11661010501
93362522208
101321472321
11618a33794
1230a684b15
13180a155b0
14c77101a1
157b03254b
hex4ec41141

1321472321 has 4 divisors (see below), whose sum is σ = 1423124052. Its totient is φ = 1219820592.

The previous prime is 1321472311. The next prime is 1321472323. The reversal of 1321472321 is 1232741231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 250873921 + 1070598400 = 15839^2 + 32720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321472321 - 210 = 1321471297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321472323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50825846 + ... + 50825871.

It is an arithmetic number, because the mean of its divisors is an integer number (355781013).

Almost surely, 21321472321 is an apocalyptic number.

It is an amenable number.

1321472321 is a deficient number, since it is larger than the sum of its proper divisors (101651731).

1321472321 is a wasteful number, since it uses less digits than its factorization.

1321472321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101651730.

The product of its digits is 2016, while the sum is 26.

The square root of 1321472321 is about 36352.0607531403. The cubic root of 1321472321 is about 1097.3690072193.

The spelling of 1321472321 in words is "one billion, three hundred twenty-one million, four hundred seventy-two thousand, three hundred twenty-one".

Divisors: 1 13 101651717 1321472321