42210197 has 4 divisors (see below), whose sum is σ = 43239756. Its totient is φ = 41180640.

The previous prime is 42210163. The next prime is 42210199. The reversal of 42210197 is 79101224.

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 22193521 + 20016676 = 4711^2 + 4474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42210197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42210199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514718 + ... + 514799.

It is an arithmetic number, because the mean of its divisors is an integer number (10809939).

Almost surely, 2^42210197 is an apocalyptic number.

It is an amenable number.

42210197 is a deficient number, since it is larger than the sum of its proper divisors (1029559).

42210197 is a wasteful number, since it uses less digits than its factorization.

42210197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029558.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 42210197 is about 6496.9375093193. The cubic root of 42210197 is about 348.1815810421.

The spelling of 42210197 in words is "forty-two million, two hundred ten thousand, one hundred ninety-seven".