42797161 has 4 divisors (see below), whose sum is σ = 46687824. Its totient is φ = 38906500.

The previous prime is 42797159. The next prime is 42797191. The reversal of 42797161 is 16179724.

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 a cyclic number.

It is not a de Polignac number, because 42797161 - 2¹ = 42797159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42797161.

It is not an unprimeable number, because it can be changed into a prime (42797191) 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, 1945315 + ... + 1945336.

It is an arithmetic number, because the mean of its divisors is an integer number (11671956).

Almost surely, 2^42797161 is an apocalyptic number.

It is an amenable number.

42797161 is a deficient number, since it is larger than the sum of its proper divisors (3890663).

42797161 is a wasteful number, since it uses less digits than its factorization.

42797161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890662.

The product of its digits is 21168, while the sum is 37.

The square root of 42797161 is about 6541.9539130141. The cubic root of 42797161 is about 349.7880648904.

The spelling of 42797161 in words is "forty-two million, seven hundred ninety-seven thousand, one hundred sixty-one".