105420172 has 36 divisors (see below), whose sum is σ = 217944216. Its totient is φ = 44229120.

The previous prime is 105420169. The next prime is 105420187. The reversal of 105420172 is 271024501.

It is a happy number.

It is a super-2 number, since 2×105420172² = 22226825329019168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348 + ... + 14524.

It is an arithmetic number, because the mean of its divisors is an integer number (6054006).

Almost surely, 2^105420172 is an apocalyptic number.

It is an amenable number.

105420172 is an abundant number, since it is smaller than the sum of its proper divisors (112524044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105420172 is a wasteful number, since it uses less digits than its factorization.

105420172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14218 (or 14203 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 105420172 is about 10267.4325904775. The cubic root of 105420172 is about 472.3978439696.

Adding to 105420172 its reverse (271024501), we get a palindrome (376444673).

The spelling of 105420172 in words is "one hundred five million, four hundred twenty thousand, one hundred seventy-two".