104155421 has 4 divisors (see below), whose sum is σ = 104845344. Its totient is φ = 103465500.

The previous prime is 104155411. The next prime is 104155423. The reversal of 104155421 is 124551401.

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 a de Polignac number, because none of the positive numbers 2^k-104155421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104155423) 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 3 ways as a sum of consecutive naturals, for example, 344735 + ... + 345036.

It is an arithmetic number, because the mean of its divisors is an integer number (26211336).

Almost surely, 2^104155421 is an apocalyptic number.

It is an amenable number.

104155421 is a deficient number, since it is larger than the sum of its proper divisors (689923).

104155421 is an equidigital number, since it uses as much as digits as its factorization.

104155421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689922.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 104155421 is about 10205.6563238236. The cubic root of 104155421 is about 470.5010817072.

The spelling of 104155421 in words is "one hundred four million, one hundred fifty-five thousand, four hundred twenty-one".