104021291 has 4 divisors (see below), whose sum is σ = 113477784. Its totient is φ = 94564800.

The previous prime is 104021279. The next prime is 104021311. The reversal of 104021291 is 192120401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192120401 = 11 ⋅17465491.

It is not a de Polignac number, because 104021291 - 2¹⁸ = 103759147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104021201) 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, 4728230 + ... + 4728251.

It is an arithmetic number, because the mean of its divisors is an integer number (28369446).

Almost surely, 2^104021291 is an apocalyptic number.

104021291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

104021291 is a deficient number, since it is larger than the sum of its proper divisors (9456493).

104021291 is an equidigital number, since it uses as much as digits as its factorization.

104021291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9456492.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 104021291 is about 10199.0828509234. The cubic root of 104021291 is about 470.2990265512.

Adding to 104021291 its reverse (192120401), we get a palindrome (296141692).

The spelling of 104021291 in words is "one hundred four million, twenty-one thousand, two hundred ninety-one".