105721453 has 8 divisors (see below), whose sum is σ = 117832320. Its totient is φ = 94265280.

The previous prime is 105721433. The next prime is 105721459. The reversal of 105721453 is 354127501.

It is a happy number.

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 105721453 - 2¹³ = 105713261 is a prime.

It is a super-2 number, since 2×105721453² = 22354051248862418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105721459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163333 + ... + 163978.

It is an arithmetic number, because the mean of its divisors is an integer number (14729040).

Almost surely, 2^105721453 is an apocalyptic number.

It is an amenable number.

105721453 is a deficient number, since it is larger than the sum of its proper divisors (12110867).

105721453 is a wasteful number, since it uses less digits than its factorization.

105721453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327347.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 105721453 is about 10282.0938042794. The cubic root of 105721453 is about 472.8474389052.

Adding to 105721453 its reverse (354127501), we get a palindrome (459848954).

The spelling of 105721453 in words is "one hundred five million, seven hundred twenty-one thousand, four hundred fifty-three".