104345521 has 4 divisors (see below), whose sum is σ = 119252032. Its totient is φ = 89439012.

The previous prime is 104345467. The next prime is 104345539. The reversal of 104345521 is 125543401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 104345521 - 2²⁵ = 70791089 is a prime.

It is a super-2 number, since 2×104345521² = 21775975505522882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104345551) 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, 7453245 + ... + 7453258.

It is an arithmetic number, because the mean of its divisors is an integer number (29813008).

Almost surely, 2^104345521 is an apocalyptic number.

It is an amenable number.

104345521 is a deficient number, since it is larger than the sum of its proper divisors (14906511).

104345521 is an equidigital number, since it uses as much as digits as its factorization.

104345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14906510.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 104345521 is about 10214.9655408131. The cubic root of 104345521 is about 470.7871538562.

Adding to 104345521 its reverse (125543401), we get a palindrome (229888922).

It can be divided in two parts, 1043 and 45521, that added together give a palindrome (46564).

The spelling of 104345521 in words is "one hundred four million, three hundred forty-five thousand, five hundred twenty-one".