105210445 has 4 divisors (see below), whose sum is σ = 126252540. Its totient is φ = 84168352.

The previous prime is 105210439. The next prime is 105210491. The reversal of 105210445 is 544012501.

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 40793769 + 64416676 = 6387^2 + 8026^2 .

It is a cyclic number.

It is not a de Polignac number, because 105210445 - 2³ = 105210437 is a prime.

It is a super-2 number, since 2×105210445² = 22138475474196050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10521040 + ... + 10521049.

It is an arithmetic number, because the mean of its divisors is an integer number (31563135).

Almost surely, 2^105210445 is an apocalyptic number.

It is an amenable number.

105210445 is a deficient number, since it is larger than the sum of its proper divisors (21042095).

105210445 is an equidigital number, since it uses as much as digits as its factorization.

105210445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21042094.

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

The square root of 105210445 is about 10257.2142904397. The cubic root of 105210445 is about 472.0843671008.

Adding to 105210445 its reverse (544012501), we get a palindrome (649222946).

The spelling of 105210445 in words is "one hundred five million, two hundred ten thousand, four hundred forty-five".