105221075 has 12 divisors (see below), whose sum is σ = 138149640. Its totient is φ = 79224960.

The previous prime is 105221071. The next prime is 105221087. The reversal of 105221075 is 570122501.

It is a happy number.

It is not a de Polignac number, because 105221075 - 2² = 105221071 is a prime.

It is a super-2 number, since 2×105221075² = 22142949248311250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105221075.

It is not an unprimeable number, because it can be changed into a prime (105221071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123365 + ... + 124214.

It is an arithmetic number, because the mean of its divisors is an integer number (11512470).

Almost surely, 2^105221075 is an apocalyptic number.

105221075 is a deficient number, since it is larger than the sum of its proper divisors (32928565).

105221075 is a wasteful number, since it uses less digits than its factorization.

105221075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247606 (or 247601 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 105221075 is about 10257.7324492307. The cubic root of 105221075 is about 472.1002656739.

Adding to 105221075 its reverse (570122501), we get a palindrome (675343576).

The spelling of 105221075 in words is "one hundred five million, two hundred twenty-one thousand, seventy-five".