105145321 has 2 divisors, whose sum is σ = 105145322. Its totient is φ = 105145320.

The previous prime is 105145307. The next prime is 105145349. The reversal of 105145321 is 123541501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101284096 + 3861225 = 10064^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 105145321 - 2²³ = 96756713 is a prime.

It is a super-2 number, since 2×105145321² = 22111077056386082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105145292 and 105145301.

It is not a weakly prime, because it can be changed into another prime (105145301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52572660 + 52572661.

It is an arithmetic number, because the mean of its divisors is an integer number (52572661).

Almost surely, 2^105145321 is an apocalyptic number.

It is an amenable number.

105145321 is a deficient number, since it is larger than the sum of its proper divisors (1).

105145321 is an equidigital number, since it uses as much as digits as its factorization.

105145321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 105145321 is about 10254.0392528993. The cubic root of 105145321 is about 471.9869421481.

Adding to 105145321 its reverse (123541501), we get a palindrome (228686822).

The spelling of 105145321 in words is "one hundred five million, one hundred forty-five thousand, three hundred twenty-one".