42045917 has 8 divisors (see below), whose sum is σ = 44920800. Its totient is φ = 39237264.

The previous prime is 42045901. The next prime is 42045943. The reversal of 42045917 is 71954024.

It is a happy number.

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 42045917 - 2⁴ = 42045901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42045967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15242 + ... + 17787.

It is an arithmetic number, because the mean of its divisors is an integer number (5615100).

Almost surely, 2^42045917 is an apocalyptic number.

It is an amenable number.

42045917 is a deficient number, since it is larger than the sum of its proper divisors (2874883).

42045917 is a wasteful number, since it uses less digits than its factorization.

42045917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33115.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 42045917 is about 6484.2823041567. The cubic root of 42045917 is about 347.7292919379.

The spelling of 42045917 in words is "forty-two million, forty-five thousand, nine hundred seventeen".