103420421 has 4 divisors (see below), whose sum is σ = 111375852. Its totient is φ = 95464992.

The previous prime is 103420417. The next prime is 103420423. The reversal of 103420421 is 124024301.

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 23961025 + 79459396 = 4895^2 + 8914^2 .

It is a cyclic number.

It is not a de Polignac number, because 103420421 - 2² = 103420417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 103420421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103420423) 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, 3977696 + ... + 3977721.

It is an arithmetic number, because the mean of its divisors is an integer number (27843963).

Almost surely, 2^103420421 is an apocalyptic number.

It is an amenable number.

103420421 is a deficient number, since it is larger than the sum of its proper divisors (7955431).

103420421 is an equidigital number, since it uses as much as digits as its factorization.

103420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7955430.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 103420421 is about 10169.5831281326. The cubic root of 103420421 is about 469.3917300980.

Adding to 103420421 its reverse (124024301), we get a palindrome (227444722).

The spelling of 103420421 in words is "one hundred three million, four hundred twenty thousand, four hundred twenty-one".