103721025 has 24 divisors (see below), whose sum is σ = 174053344. Its totient is φ = 54489600.

The previous prime is 103721017. The next prime is 103721069. The reversal of 103721025 is 520127301.

It is not a de Polignac number, because 103721025 - 2³ = 103721017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103720992 and 103721010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5296 + ... + 15345.

Almost surely, 2^103721025 is an apocalyptic number.

103721025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103721025 is a deficient number, since it is larger than the sum of its proper divisors (70332319).

103721025 is a wasteful number, since it uses less digits than its factorization.

103721025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20721 (or 20716 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 103721025 is about 10184.3519676021. The cubic root of 103721025 is about 469.8460715182.

Adding to 103721025 its reverse (520127301), we get a palindrome (623848326).

The spelling of 103721025 in words is "one hundred three million, seven hundred twenty-one thousand, twenty-five".