42072217 has 8 divisors (see below), whose sum is σ = 45968832. Its totient is φ = 38187600.

The previous prime is 42072211. The next prime is 42072223. The reversal of 42072217 is 71227024.

It is an interprime number because it is at equal distance from previous prime (42072211) and next prime (42072223).

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

It is not a de Polignac number, because 42072217 - 2¹¹ = 42070169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42072191 and 42072200.

It is not an unprimeable number, because it can be changed into a prime (42072211) 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, 5367 + ... + 10627.

It is an arithmetic number, because the mean of its divisors is an integer number (5746104).

Almost surely, 2^42072217 is an apocalyptic number.

It is an amenable number.

42072217 is a deficient number, since it is larger than the sum of its proper divisors (3896615).

42072217 is a wasteful number, since it uses less digits than its factorization.

42072217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999.

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

The square root of 42072217 is about 6486.3099679248. The cubic root of 42072217 is about 347.8017791525.

The spelling of 42072217 in words is "forty-two million, seventy-two thousand, two hundred seventeen".