42656449 has 16 divisors (see below), whose sum is σ = 48087936. Its totient is φ = 37497600.

The previous prime is 42656447. The next prime is 42656461. The reversal of 42656449 is 94465624.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42656449 - 2¹ = 42656447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42656447) 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 15 ways as a sum of consecutive naturals, for example, 126409 + ... + 126745.

It is an arithmetic number, because the mean of its divisors is an integer number (3005496).

Almost surely, 2^42656449 is an apocalyptic number.

It is an amenable number.

42656449 is a deficient number, since it is larger than the sum of its proper divisors (5431487).

42656449 is a wasteful number, since it uses less digits than its factorization.

42656449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its digits is 207360, while the sum is 40.

The square root of 42656449 is about 6531.1904734129. The cubic root of 42656449 is about 349.4042900614.

The spelling of 42656449 in words is "forty-two million, six hundred fifty-six thousand, four hundred forty-nine".