105212247 has 8 divisors (see below), whose sum is σ = 160323456. Its totient is φ = 60121272.

The previous prime is 105212231. The next prime is 105212249. The reversal of 105212247 is 742212501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 105212247 - 2⁴ = 105212231 is a prime.

It is a super-2 number, since 2×105212247² = 22139233837578018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105212249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2505033 + ... + 2505074.

It is an arithmetic number, because the mean of its divisors is an integer number (20040432).

Almost surely, 2^105212247 is an apocalyptic number.

105212247 is a deficient number, since it is larger than the sum of its proper divisors (55111209).

105212247 is an equidigital number, since it uses as much as digits as its factorization.

105212247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010117.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 105212247 is about 10257.3021306774. The cubic root of 105212247 is about 472.0870623059.

Adding to 105212247 its reverse (742212501), we get a palindrome (847424748).

The spelling of 105212247 in words is "one hundred five million, two hundred twelve thousand, two hundred forty-seven".