42617945 has 8 divisors (see below), whose sum is σ = 52331136. Its totient is φ = 33301296.

The previous prime is 42617941. The next prime is 42617947. The reversal of 42617945 is 54971624.

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

It is a cyclic number.

It is not a de Polignac number, because 42617945 - 2² = 42617941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42617899 and 42617908.

It is not an unprimeable number, because it can be changed into a prime (42617941) 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 7 ways as a sum of consecutive naturals, for example, 98897 + ... + 99326.

It is an arithmetic number, because the mean of its divisors is an integer number (6541392).

Almost surely, 2^42617945 is an apocalyptic number.

It is an amenable number.

42617945 is a deficient number, since it is larger than the sum of its proper divisors (9713191).

42617945 is a wasteful number, since it uses less digits than its factorization.

42617945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198271.

The product of its digits is 60480, while the sum is 38.

The square root of 42617945 is about 6528.2421064173. The cubic root of 42617945 is about 349.2991280591.

The spelling of 42617945 in words is "forty-two million, six hundred seventeen thousand, nine hundred forty-five".