103436521 has 4 divisors (see below), whose sum is σ = 103461444. Its totient is φ = 103411600.

The previous prime is 103436503. The next prime is 103436561. The reversal of 103436521 is 125634301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67568400 + 35868121 = 8220^2 + 5989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103436521 is a prime.

It is a super-2 number, since 2×103436521² = 21398227753166882, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103436561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4570 + ... + 15091.

It is an arithmetic number, because the mean of its divisors is an integer number (25865361).

Almost surely, 2^103436521 is an apocalyptic number.

It is an amenable number.

103436521 is a deficient number, since it is larger than the sum of its proper divisors (24923).

103436521 is an equidigital number, since it uses as much as digits as its factorization.

103436521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24922.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 103436521 is about 10170.3746735310. The cubic root of 103436521 is about 469.4160863926.

The spelling of 103436521 in words is "one hundred three million, four hundred thirty-six thousand, five hundred twenty-one".