105453521 has 4 divisors (see below), whose sum is σ = 106386852. Its totient is φ = 104520192.

The previous prime is 105453497. The next prime is 105453527. The reversal of 105453521 is 125354501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125354501 = 29 ⋅4322569.

It can be written as a sum of positive squares in 2 ways, for example, as 33814225 + 71639296 = 5815^2 + 8464^2 .

It is a cyclic number.

It is not a de Polignac number, because 105453521 - 2⁶ = 105453457 is a prime.

It is a super-2 number, since 2×105453521² = 22240890182594882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105453527) 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 in 3 ways as a sum of consecutive naturals, for example, 466496 + ... + 466721.

It is an arithmetic number, because the mean of its divisors is an integer number (26596713).

Almost surely, 2^105453521 is an apocalyptic number.

It is an amenable number.

105453521 is a deficient number, since it is larger than the sum of its proper divisors (933331).

105453521 is an equidigital number, since it uses as much as digits as its factorization.

105453521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933330.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 105453521 is about 10269.0564805147. The cubic root of 105453521 is about 472.4476520676.

The spelling of 105453521 in words is "one hundred five million, four hundred fifty-three thousand, five hundred twenty-one".