196842561 has 8 divisors (see below), whose sum is σ = 262549344. Its totient is φ = 131182080.

The previous prime is 196842539. The next prime is 196842563. The reversal of 196842561 is 165248691.

196842561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

196842561 is a nontrivial binomial coefficient, being equal to C(19842, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 196842561 - 2²⁶ = 129733697 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (196842563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 19841.

It is an arithmetic number, because the mean of its divisors is an integer number (32818668).

Almost surely, 2^196842561 is an apocalyptic number.

196842561 is the 19841-st triangular number and also the 9921-st hexagonal number.

It is an amenable number.

196842561 is a deficient number, since it is larger than the sum of its proper divisors (65706783).

196842561 is a wasteful number, since it uses less digits than its factorization.

196842561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23151.

The product of its digits is 103680, while the sum is 42.

The square root of 196842561 is about 14030.0591944582. The cubic root of 196842561 is about 581.7097400071.

The spelling of 196842561 in words is "one hundred ninety-six million, eight hundred forty-two thousand, five hundred sixty-one".