104170521 has 72 divisors (see below), whose sum is σ = 184855104. Its totient is φ = 51710400.

The previous prime is 104170513. The next prime is 104170589. The reversal of 104170521 is 125071401.

It is a happy number.

It is not a de Polignac number, because 104170521 - 2³ = 104170513 is a prime.

It is a super-2 number, since 2×104170521² = 21702994890822882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (104170511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 689796 + ... + 689946.

It is an arithmetic number, because the mean of its divisors is an integer number (2567432).

Almost surely, 2^104170521 is an apocalyptic number.

It is an amenable number.

104170521 is a deficient number, since it is larger than the sum of its proper divisors (80684583).

104170521 is a wasteful number, since it uses less digits than its factorization.

104170521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 104170521 is about 10206.3960828492. The cubic root of 104170521 is about 470.5238176754.

It can be divided in two parts, 1041705 and 21, that multiplied together give a triangular number (21875805 = T₆₆₁₄).

The spelling of 104170521 in words is "one hundred four million, one hundred seventy thousand, five hundred twenty-one".