105412109 has 4 divisors (see below), whose sum is σ = 114995040. Its totient is φ = 95829180.

The previous prime is 105412103. The next prime is 105412127. The reversal of 105412109 is 901214501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901214501 = 11 ⋅81928591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105412109 is a prime.

It is a super-2 number, since 2×105412109² = 22223425447655762, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105412103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4791449 + ... + 4791470.

It is an arithmetic number, because the mean of its divisors is an integer number (28748760).

Almost surely, 2^105412109 is an apocalyptic number.

It is an amenable number.

105412109 is a deficient number, since it is larger than the sum of its proper divisors (9582931).

105412109 is an equidigital number, since it uses as much as digits as its factorization.

105412109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9582930.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 105412109 is about 10267.0399336907. The cubic root of 105412109 is about 472.3857999719.

It can be divided in two parts, 105 and 412109, that added together give a palindrome (412214).

The spelling of 105412109 in words is "one hundred five million, four hundred twelve thousand, one hundred nine".