104878561 has 4 divisors (see below), whose sum is σ = 104902192. Its totient is φ = 104854932.

The previous prime is 104878541. The next prime is 104878639. The reversal of 104878561 is 165878401.

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 104878561 - 2¹³ = 104870369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104878531) 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, 2931 + ... + 14776.

It is an arithmetic number, because the mean of its divisors is an integer number (26225548).

Almost surely, 2^104878561 is an apocalyptic number.

It is an amenable number.

104878561 is a deficient number, since it is larger than the sum of its proper divisors (23631).

104878561 is an equidigital number, since it uses as much as digits as its factorization.

104878561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23630.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 104878561 is about 10241.0234351846. The cubic root of 104878561 is about 471.5874510314.

The spelling of 104878561 in words is "one hundred four million, eight hundred seventy-eight thousand, five hundred sixty-one".