42508449 has 32 divisors (see below), whose sum is σ = 68509440. Its totient is φ = 25940736.

The previous prime is 42508441. The next prime is 42508451. The reversal of 42508449 is 94480524.

It is not a de Polignac number, because 42508449 - 2³ = 42508441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42508441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15732 + ... + 18234.

It is an arithmetic number, because the mean of its divisors is an integer number (2140920).

Almost surely, 2^42508449 is an apocalyptic number.

It is an amenable number.

42508449 is a deficient number, since it is larger than the sum of its proper divisors (26000991).

42508449 is a wasteful number, since it uses less digits than its factorization.

42508449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 42508449 is about 6519.8503817189. The cubic root of 42508449 is about 348.9997263293. Note that the first 3 decimals are identical.

The spelling of 42508449 in words is "forty-two million, five hundred eight thousand, four hundred forty-nine".