105345561 has 4 divisors (see below), whose sum is σ = 140460752. Its totient is φ = 70230372.

The previous prime is 105345529. The next prime is 105345563. The reversal of 105345561 is 165543501.

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.

It is not a de Polignac number, because 105345561 - 2⁵ = 105345529 is a prime.

It is a super-2 number, since 2×105345561² = 22195374444809442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105345563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17557591 + ... + 17557596.

It is an arithmetic number, because the mean of its divisors is an integer number (35115188).

Almost surely, 2^105345561 is an apocalyptic number.

It is an amenable number.

105345561 is a deficient number, since it is larger than the sum of its proper divisors (35115191).

105345561 is an equidigital number, since it uses as much as digits as its factorization.

105345561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35115190.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 105345561 is about 10263.7985658332. The cubic root of 105345561 is about 472.2863713319.

The spelling of 105345561 in words is "one hundred five million, three hundred forty-five thousand, five hundred sixty-one".