105019445 has 6 divisors (see below), whose sum is σ = 126050838. Its totient is φ = 83997224.

The previous prime is 105019399. The next prime is 105019451. The reversal of 105019445 is 544910501.

It can be written as a sum of positive squares in only one way, i.e., 84015556 + 21003889 = 9166^2 + 4583^2 .

It is not a de Polignac number, because 105019445 - 2⁶ = 105019381 is a prime.

It is a super-2 number, since 2×105019445² = 22058167656216050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20624 + ... + 25206.

It is an arithmetic number, because the mean of its divisors is an integer number (21008473).

Almost surely, 2^105019445 is an apocalyptic number.

It is an amenable number.

105019445 is a deficient number, since it is larger than the sum of its proper divisors (21031393).

105019445 is an frugal number, since it uses more digits than its factorization.

105019445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9171 (or 4588 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 105019445 is about 10247.8995408815. The cubic root of 105019445 is about 471.7985186339.

Adding to 105019445 its reverse (544910501), we get a palindrome (649929946).

The spelling of 105019445 in words is "one hundred five million, nineteen thousand, four hundred forty-five".