105452021 has 4 divisors (see below), whose sum is σ = 105476844. Its totient is φ = 105427200.

The previous prime is 105451993. The next prime is 105452023. The reversal of 105452021 is 120254501.

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 79299025 + 26152996 = 8905^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 105452021 - 2¹⁴ = 105435637 is a prime.

It is a super-2 number, since 2×105452021² = 22240257465968882, 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 = 105451984 and 105452002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105452023) 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, 4250 + ... + 15131.

It is an arithmetic number, because the mean of its divisors is an integer number (26369211).

Almost surely, 2^105452021 is an apocalyptic number.

It is an amenable number.

105452021 is a deficient number, since it is larger than the sum of its proper divisors (24823).

105452021 is an equidigital number, since it uses as much as digits as its factorization.

105452021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24822.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 105452021 is about 10268.9834453075. The cubic root of 105452021 is about 472.4454119817.

The spelling of 105452021 in words is "one hundred five million, four hundred fifty-two thousand, twenty-one".