103405217 has 12 divisors (see below), whose sum is σ = 110423040. Its totient is φ = 96781608.

The previous prime is 103405207. The next prime is 103405219. The reversal of 103405217 is 712504301.

It is not a de Polignac number, because 103405217 - 2¹² = 103401121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103405192 and 103405201.

It is not an unprimeable number, because it can be changed into a prime (103405219) 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 11 ways as a sum of consecutive naturals, for example, 22784 + ... + 26942.

It is an arithmetic number, because the mean of its divisors is an integer number (9201920).

Almost surely, 2^103405217 is an apocalyptic number.

It is an amenable number.

103405217 is a deficient number, since it is larger than the sum of its proper divisors (7017823).

103405217 is an equidigital number, since it uses as much as digits as its factorization.

103405217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252 (or 4229 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 103405217 is about 10168.8355773904. The cubic root of 103405217 is about 469.3687269633.

Adding to 103405217 its reverse (712504301), we get a palindrome (815909518).

The spelling of 103405217 in words is "one hundred three million, four hundred five thousand, two hundred seventeen".