42717220 has 96 divisors (see below), whose sum is σ = 112896000. Its totient is φ = 13491072.

The previous prime is 42717217. The next prime is 42717223. The reversal of 42717220 is 2271724.

It is an interprime number because it is at equal distance from previous prime (42717217) and next prime (42717223).

It is not an unprimeable number, because it can be changed into a prime (42717223) 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, 88941 + ... + 89419.

It is an arithmetic number, because the mean of its divisors is an integer number (1176000).

Almost surely, 2^42717220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42717220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56448000).

42717220 is an abundant number, since it is smaller than the sum of its proper divisors (70178780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42717220 is a wasteful number, since it uses less digits than its factorization.

42717220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 42717220 is about 6535.8411853410. The cubic root of 42717220 is about 349.5701389384.

Adding to 42717220 its reverse (2271724), we get a palindrome (44988944).

The spelling of 42717220 in words is "forty-two million, seven hundred seventeen thousand, two hundred twenty".