103420521 has 12 divisors (see below), whose sum is σ = 149866548. Its totient is φ = 68724864.

The previous prime is 103420511. The next prime is 103420607. The reversal of 103420521 is 125024301.

103420521 is a `hidden beast` number, since 103 + 42 + 0 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36000000 + 67420521 = 6000^2 + 8211^2 .

It is not a de Polignac number, because 103420521 - 2¹⁰ = 103419497 is a prime.

It is a super-2 number, since 2×103420521² = 21391608327822882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 103420494 and 103420503.

It is not an unprimeable number, because it can be changed into a prime (103420511) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 15540 + ... + 21173.

It is an arithmetic number, because the mean of its divisors is an integer number (12488879).

Almost surely, 2^103420521 is an apocalyptic number.

It is an amenable number.

103420521 is a deficient number, since it is larger than the sum of its proper divisors (46446027).

103420521 is a wasteful number, since it uses less digits than its factorization.

103420521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37032 (or 37029 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 103420521 is about 10169.5880447538. The cubic root of 103420521 is about 469.3918813871.

Adding to 103420521 its reverse (125024301), we get a palindrome (228444822).

The spelling of 103420521 in words is "one hundred three million, four hundred twenty thousand, five hundred twenty-one".