42508545 has 8 divisors (see below), whose sum is σ = 68013696. Its totient is φ = 22671216.

The previous prime is 42508537. The next prime is 42508559. The reversal of 42508545 is 54580524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42508545 - 2³ = 42508537 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416937 + ... + 1416966.

It is an arithmetic number, because the mean of its divisors is an integer number (8501712).

Almost surely, 2^42508545 is an apocalyptic number.

It is an amenable number.

42508545 is a deficient number, since it is larger than the sum of its proper divisors (25505151).

42508545 is a wasteful number, since it uses less digits than its factorization.

42508545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833911.

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 42508545 is about 6519.8577438469. The cubic root of 42508545 is about 348.9999890532. Note that the first 4 decimals are identical.

The spelling of 42508545 in words is "forty-two million, five hundred eight thousand, five hundred forty-five".