103915021 has 4 divisors (see below), whose sum is σ = 118760032. Its totient is φ = 89070012.

The previous prime is 103915001. The next prime is 103915027. The reversal of 103915021 is 120519301.

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: 120519301 = 7 ⋅17217043.

It is a cyclic number.

It is not a de Polignac number, because 103915021 - 2⁷ = 103914893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103914983 and 103915001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103915027) 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, 7422495 + ... + 7422508.

It is an arithmetic number, because the mean of its divisors is an integer number (29690008).

Almost surely, 2^103915021 is an apocalyptic number.

It is an amenable number.

103915021 is a deficient number, since it is larger than the sum of its proper divisors (14845011).

103915021 is an equidigital number, since it uses as much as digits as its factorization.

103915021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14845010.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 103915021 is about 10193.8717374705. The cubic root of 103915021 is about 470.1388166991.

The spelling of 103915021 in words is "one hundred three million, nine hundred fifteen thousand, twenty-one".