103200521 has 8 divisors (see below), whose sum is σ = 103910664. Its totient is φ = 102493440.

The previous prime is 103200479. The next prime is 103200551. The reversal of 103200521 is 125002301.

103200521 = 3² + 4² + ... + 676².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3200521 + 100000000 = 1789^2 + 10000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103200521 - 2¹⁸ = 102938377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103200496 and 103200505.

It is not an unprimeable number, because it can be changed into a prime (103200551) 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 7 ways as a sum of consecutive naturals, for example, 125291 + ... + 126111.

It is an arithmetic number, because the mean of its divisors is an integer number (12988833).

Almost surely, 2^103200521 is an apocalyptic number.

It is an amenable number.

103200521 is a deficient number, since it is larger than the sum of its proper divisors (710143).

103200521 is an equidigital number, since it uses as much as digits as its factorization.

103200521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 103200521 is about 10158.7657222716. The cubic root of 103200521 is about 469.0588091126.

Adding to 103200521 its reverse (125002301), we get a palindrome (228202822).

The spelling of 103200521 in words is "one hundred three million, two hundred thousand, five hundred twenty-one".