196821265 has 4 divisors (see below), whose sum is σ = 236185524. Its totient is φ = 157457008.

The previous prime is 196821259. The next prime is 196821293. The reversal of 196821265 is 562128691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562128691 = 2593 ⋅216787.

It can be written as a sum of positive squares in 2 ways, for example, as 68293696 + 128527569 = 8264^2 + 11337^2 .

It is a cyclic number.

It is not a de Polignac number, because 196821265 - 2¹⁵ = 196788497 is a prime.

It is a super-3 number, since 3×196821265³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is an unprimeable number.

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, 19682122 + ... + 19682131.

It is an arithmetic number, because the mean of its divisors is an integer number (59046381).

Almost surely, 2^196821265 is an apocalyptic number.

It is an amenable number.

196821265 is a deficient number, since it is larger than the sum of its proper divisors (39364259).

196821265 is an equidigital number, since it uses as much as digits as its factorization.

196821265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39364258.

The product of its digits is 51840, while the sum is 40.

The square root of 196821265 is about 14029.3002320144. The cubic root of 196821265 is about 581.6887612490.

The spelling of 196821265 in words is "one hundred ninety-six million, eight hundred twenty-one thousand, two hundred sixty-five".