42500197 has 2 divisors, whose sum is σ = 42500198. Its totient is φ = 42500196.

The previous prime is 42500191. The next prime is 42500201. The reversal of 42500197 is 79100524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34468641 + 8031556 = 5871^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 42500197 - 2¹⁵ = 42467429 is a prime.

It is equal to p_2576215 and since 42500197 and 2576215 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42500191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21250098 + 21250099.

It is an arithmetic number, because the mean of its divisors is an integer number (21250099).

Almost surely, 2^42500197 is an apocalyptic number.

It is an amenable number.

42500197 is a deficient number, since it is larger than the sum of its proper divisors (1).

42500197 is an equidigital number, since it uses as much as digits as its factorization.

42500197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 42500197 is about 6519.2175143954. The cubic root of 42500197 is about 348.9771415477.

The spelling of 42500197 in words is "forty-two million, five hundred thousand, one hundred ninety-seven".