105045421 has 4 divisors (see below), whose sum is σ = 113125852. Its totient is φ = 96964992.

The previous prime is 105045389. The next prime is 105045443. The reversal of 105045421 is 124540501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124540501 = 2237 ⋅55673.

It can be written as a sum of positive squares in 2 ways, for example, as 54834025 + 50211396 = 7405^2 + 7086^2 .

It is a cyclic number.

It is not a de Polignac number, because 105045421 - 2⁵ = 105045389 is a prime.

It is a super-2 number, since 2×105045421² = 22069080946134482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105045392 and 105045401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105045491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040196 + ... + 4040221.

It is an arithmetic number, because the mean of its divisors is an integer number (28281463).

Almost surely, 2^105045421 is an apocalyptic number.

It is an amenable number.

105045421 is a deficient number, since it is larger than the sum of its proper divisors (8080431).

105045421 is an equidigital number, since it uses as much as digits as its factorization.

105045421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080430.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 105045421 is about 10249.1668441879. The cubic root of 105045421 is about 471.8374143769.

Adding to 105045421 its reverse (124540501), we get a palindrome (229585922).

The spelling of 105045421 in words is "one hundred five million, forty-five thousand, four hundred twenty-one".