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74217 = 31113173
BaseRepresentation
bin10010000111101001
310202210210
4102013221
54333332
61331333
7426243
oct220751
9122723
1074217
1150840
1236b49
1327a20
141d093
1516ecc
hex121e9

74217 has 16 divisors (see below), whose sum is σ = 116928. Its totient is φ = 41280.

The previous prime is 74209. The next prime is 74219. The reversal of 74217 is 71247.

It can be divided in two parts, 7 and 4217, that added together give a palindrome (4224).

It is not a de Polignac number, because 74217 - 23 = 74209 is a prime.

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 74193 and 74202.

It is not an unprimeable number, because it can be changed into a prime (74219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343 + ... + 515.

It is an arithmetic number, because the mean of its divisors is an integer number (7308).

274217 is an apocalyptic number.

It is an amenable number.

74217 is a deficient number, since it is larger than the sum of its proper divisors (42711).

74217 is a wasteful number, since it uses less digits than its factorization.

74217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its digits is 392, while the sum is 21.

The square root of 74217 is about 272.4279721321. The cubic root of 74217 is about 42.0243622831.

The spelling of 74217 in words is "seventy-four thousand, two hundred seventeen", and thus it is an iban number.

Divisors: 1 3 11 13 33 39 143 173 429 519 1903 2249 5709 6747 24739 74217