104125821 has 16 divisors (see below), whose sum is σ = 142193664. Its totient is φ = 67746224.

The previous prime is 104125811. The next prime is 104125823. The reversal of 104125821 is 128521401.

It is a cyclic number.

It is not a de Polignac number, because 104125821 - 2⁹ = 104125309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 104125791 and 104125800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104125823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61630 + ... + 63296.

It is an arithmetic number, because the mean of its divisors is an integer number (8887104).

Almost surely, 2^104125821 is an apocalyptic number.

It is an amenable number.

104125821 is a deficient number, since it is larger than the sum of its proper divisors (38067843).

104125821 is a wasteful number, since it uses less digits than its factorization.

104125821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 104125821 is about 10204.2060445681. The cubic root of 104125821 is about 470.4565068101.

It can be divided in two parts, 1041 and 25821, that added together give a palindrome (26862).

The spelling of 104125821 in words is "one hundred four million, one hundred twenty-five thousand, eight hundred twenty-one".