105521145 has 32 divisors (see below), whose sum is σ = 172969344. Its totient is φ = 54912000.

The previous prime is 105521093. The next prime is 105521161. The reversal of 105521145 is 541125501.

It is not a de Polignac number, because 105521145 - 2⁶ = 105521081 is a prime.

It is a super-2 number, since 2×105521145² = 22269424084222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262945 + ... + 263345.

It is an arithmetic number, because the mean of its divisors is an integer number (5405292).

Almost surely, 2^105521145 is an apocalyptic number.

105521145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

105521145 is a deficient number, since it is larger than the sum of its proper divisors (67448199).

105521145 is a wasteful number, since it uses less digits than its factorization.

105521145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 105521145 is about 10272.3485630113. The cubic root of 105521145 is about 472.5486190557.

Adding to 105521145 its reverse (541125501), we get a palindrome (646646646).

The spelling of 105521145 in words is "one hundred five million, five hundred twenty-one thousand, one hundred forty-five".