103521603 has 8 divisors (see below), whose sum is σ = 138078400. Its totient is φ = 68989608.

The previous prime is 103521563. The next prime is 103521623. The reversal of 103521603 is 306125301.

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

It is not a de Polignac number, because 103521603 - 2¹⁰ = 103520579 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 103521603.

It is not an unprimeable number, because it can be changed into a prime (103521623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8568 + ... + 16746.

It is an arithmetic number, because the mean of its divisors is an integer number (17259800).

Almost surely, 2^103521603 is an apocalyptic number.

103521603 is a deficient number, since it is larger than the sum of its proper divisors (34556797).

103521603 is an equidigital number, since it uses as much as digits as its factorization.

103521603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12401.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 103521603 is about 10174.5566488177. The cubic root of 103521603 is about 469.5447576249.

Adding to 103521603 its reverse (306125301), we get a palindrome (409646904).

The spelling of 103521603 in words is "one hundred three million, five hundred twenty-one thousand, six hundred three".