197406 has 24 divisors (see below), whose sum is σ = 467064. Its totient is φ = 59760.

The previous prime is 197389. The next prime is 197419. The reversal of 197406 is 604791.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 197406.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 197406.

It is an unprimeable number.

197406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (19461).

2¹⁹⁷⁴⁰⁶ is an apocalyptic number.

197406 is an abundant number, since it is smaller than the sum of its proper divisors (269658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197406 is a wasteful number, since it uses less digits than its factorization.

197406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 197406 is about 444.3039500162. The cubic root of 197406 is about 58.2264236836.

The spelling of 197406 in words is "one hundred ninety-seven thousand, four hundred six".