103240421 has 4 divisors (see below), whose sum is σ = 103276992. Its totient is φ = 103203852.

The previous prime is 103240391. The next prime is 103240427. The reversal of 103240421 is 124042301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124042301 = 10601 ⋅11701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103240421 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 103240421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103240427) 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, 13661 + ... + 19826.

It is an arithmetic number, because the mean of its divisors is an integer number (25819248).

Almost surely, 2^103240421 is an apocalyptic number.

It is an amenable number.

103240421 is a deficient number, since it is larger than the sum of its proper divisors (36571).

103240421 is an equidigital number, since it uses as much as digits as its factorization.

103240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36570.

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

The square root of 103240421 is about 10160.7293537423. The cubic root of 103240421 is about 469.1192514271.

Adding to 103240421 its reverse (124042301), we get a palindrome (227282722).

The spelling of 103240421 in words is "one hundred three million, two hundred forty thousand, four hundred twenty-one".