105710621 has 4 divisors (see below), whose sum is σ = 107443644. Its totient is φ = 103977600.

The previous prime is 105710617. The next prime is 105710639. The reversal of 105710621 is 126017501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1466521 + 104244100 = 1211^2 + 10210^2 .

It is a cyclic number.

It is not a de Polignac number, because 105710621 - 2² = 105710617 is a prime.

It is a super-2 number, since 2×105710621² = 22349470784411282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105710021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 866420 + ... + 866541.

It is an arithmetic number, because the mean of its divisors is an integer number (26860911).

Almost surely, 2^105710621 is an apocalyptic number.

It is an amenable number.

105710621 is a deficient number, since it is larger than the sum of its proper divisors (1733023).

105710621 is an equidigital number, since it uses as much as digits as its factorization.

105710621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733022.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 105710621 is about 10281.5670498227. The cubic root of 105710621 is about 472.8312893656.

The spelling of 105710621 in words is "one hundred five million, seven hundred ten thousand, six hundred twenty-one".