10194521 has 4 divisors (see below), whose sum is σ = 10284852. Its totient is φ = 10104192.

The previous prime is 10194517. The next prime is 10194533. The reversal of 10194521 is 12549101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4044121 + 6150400 = 2011^2 + 2480^2 .

It is a cyclic number.

It is not a de Polignac number, because 10194521 - 2² = 10194517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10494521) 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, 44996 + ... + 45221.

It is an arithmetic number, because the mean of its divisors is an integer number (2571213).

Almost surely, 2^10194521 is an apocalyptic number.

It is an amenable number.

10194521 is a deficient number, since it is larger than the sum of its proper divisors (90331).

10194521 is an equidigital number, since it uses as much as digits as its factorization.

10194521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90330.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 10194521 is about 3192.8859985912. The cubic root of 10194521 is about 216.8314504489.

The spelling of 10194521 in words is "ten million, one hundred ninety-four thousand, five hundred twenty-one".