42021317 has 8 divisors (see below), whose sum is σ = 45451224. Its totient is φ = 38619648.

The previous prime is 42021313. The next prime is 42021341. The reversal of 42021317 is 71312024.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 42003361 = 134^2 + 6481^2 .

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 42021317 - 2² = 42021313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021313) 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, 3908 + ... + 9965.

It is an arithmetic number, because the mean of its divisors is an integer number (5681403).

Almost surely, 2^42021317 is an apocalyptic number.

It is an amenable number.

42021317 is a deficient number, since it is larger than the sum of its proper divisors (3429907).

42021317 is a wasteful number, since it uses less digits than its factorization.

42021317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14119.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 42021317 is about 6482.3851320328. The cubic root of 42021317 is about 347.6614628437.

The spelling of 42021317 in words is "forty-two million, twenty-one thousand, three hundred seventeen".