103042421 has 4 divisors (see below), whose sum is σ = 104104812. Its totient is φ = 101980032.

The previous prime is 103042411. The next prime is 103042427. The reversal of 103042421 is 124240301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124240301 = 17 ⋅7308253.

It can be written as a sum of positive squares in 2 ways, for example, as 57547396 + 45495025 = 7586^2 + 6745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103042421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 103042421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103042427) 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 3 ways as a sum of consecutive naturals, for example, 531050 + ... + 531243.

It is an arithmetic number, because the mean of its divisors is an integer number (26026203).

Almost surely, 2^103042421 is an apocalyptic number.

It is an amenable number.

103042421 is a deficient number, since it is larger than the sum of its proper divisors (1062391).

103042421 is an equidigital number, since it uses as much as digits as its factorization.

103042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062390.

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

The square root of 103042421 is about 10150.9812826150. The cubic root of 103042421 is about 468.8191588388.

Adding to 103042421 its reverse (124240301), we get a palindrome (227282722).

The spelling of 103042421 in words is "one hundred three million, forty-two thousand, four hundred twenty-one".