105405457 has 4 divisors (see below), whose sum is σ = 111605796. Its totient is φ = 99205120.

The previous prime is 105405409. The next prime is 105405463. The reversal of 105405457 is 754504501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754504501 = 12569 ⋅60029.

It can be written as a sum of positive squares in 2 ways, for example, as 38427601 + 66977856 = 6199^2 + 8184^2 .

It is a cyclic number.

It is not a de Polignac number, because 105405457 - 2¹¹ = 105403409 is a prime.

It is a super-2 number, since 2×105405457² = 22220620730757698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105405467) 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, 3100144 + ... + 3100177.

It is an arithmetic number, because the mean of its divisors is an integer number (27901449).

Almost surely, 2^105405457 is an apocalyptic number.

105405457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

105405457 is a deficient number, since it is larger than the sum of its proper divisors (6200339).

105405457 is an equidigital number, since it uses as much as digits as its factorization.

105405457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200338.

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 105405457 is about 10266.7159793188. The cubic root of 105405457 is about 472.3758631741.

Adding to 105405457 its reverse (754504501), we get a palindrome (859909958).

The spelling of 105405457 in words is "one hundred five million, four hundred five thousand, four hundred fifty-seven".