103421 has 2 divisors, whose sum is σ = 103422.
Its totient is φ = 103420.
The previous prime is 103409. The next prime is 103423. The reversal of 103421 is 124301.
Adding to 103421 its reverse (124301), we get a palindrome (227722).
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 84100 + 19321 = 290^2 + 139^2
It is an emirp because it is prime and its reverse (124301) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 103421 - 26 = 103357 is a prime.
Together with 103423, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 103421.
It is not a weakly prime, because it can be changed into another prime (103423) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51710 + 51711.
It is an arithmetic number, because the mean of its divisors is an integer number (51711).
2103421 is an apocalyptic number.
It is an amenable number.
103421 is a deficient number, since it is larger than the sum of its proper divisors (1).
103421 is an equidigital number, since it uses as much as digits as its factorization.
103421 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 24, while the sum is 11.
The square root of 103421 is about 321.5913556052.
The cubic root of 103421 is about 46.9392606061.
The spelling of 103421 in words is "one hundred three thousand, four hundred twenty-one", and thus it is an iban number.