42049161 has 48 divisors (see below), whose sum is σ = 77395968. Its totient is φ = 21362400.

The previous prime is 42049081. The next prime is 42049169. The reversal of 42049161 is 16194024.

It is not a de Polignac number, because 42049161 - 2¹⁷ = 41918089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42049169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31926 + ... + 33216.

It is an arithmetic number, because the mean of its divisors is an integer number (1612416).

Almost surely, 2^42049161 is an apocalyptic number.

It is an amenable number.

42049161 is a deficient number, since it is larger than the sum of its proper divisors (35346807).

42049161 is a wasteful number, since it uses less digits than its factorization.

42049161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 42049161 is about 6484.5324426669. The cubic root of 42049161 is about 347.7382345804.

The spelling of 42049161 in words is "forty-two million, forty-nine thousand, one hundred sixty-one".