42565197 has 4 divisors (see below), whose sum is σ = 56753600. Its totient is φ = 28376796.

The previous prime is 42565189. The next prime is 42565213. The reversal of 42565197 is 79156524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42565197 - 2³ = 42565189 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 (42565177) 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, 7094197 + ... + 7094202.

It is an arithmetic number, because the mean of its divisors is an integer number (14188400).

Almost surely, 2^42565197 is an apocalyptic number.

It is an amenable number.

42565197 is a deficient number, since it is larger than the sum of its proper divisors (14188403).

42565197 is a wasteful number, since it uses less digits than its factorization.

42565197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14188402.

The product of its digits is 75600, while the sum is 39.

The square root of 42565197 is about 6524.2008706048. The cubic root of 42565197 is about 349.1549600170.

It can be divided in two parts, 4256 and 5197, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 42565197 in words is "forty-two million, five hundred sixty-five thousand, one hundred ninety-seven".