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442521 = 3249169
BaseRepresentation
bin1101100000010011001
3211111000200
41230002121
5103130041
613252413
73522102
oct1540231
9744020
10442521
11282522
12194109
13126561
14b73a9
158b1b6
hex6c099

442521 has 6 divisors (see below), whose sum is σ = 639210. Its totient is φ = 295008.

The previous prime is 442517. The next prime is 442531. The reversal of 442521 is 125244.

It can be written as a sum of positive squares in only one way, i.e., 404496 + 38025 = 636^2 + 195^2 .

It is not a de Polignac number, because 442521 - 22 = 442517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442494 and 442503.

It is not an unprimeable number, because it can be changed into a prime (442501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24576 + ... + 24593.

It is an arithmetic number, because the mean of its divisors is an integer number (106535).

2442521 is an apocalyptic number.

It is an amenable number.

442521 is a deficient number, since it is larger than the sum of its proper divisors (196689).

442521 is a wasteful number, since it uses less digits than its factorization.

442521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49175 (or 49172 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 442521 is about 665.2225191618. Note that the first 3 decimals coincide. The cubic root of 442521 is about 76.2040339278.

Adding to 442521 its reverse (125244), we get a palindrome (567765).

It can be divided in two parts, 44252 and 1, that added together give a triangular number (44253 = T297).

The spelling of 442521 in words is "four hundred forty-two thousand, five hundred twenty-one".

Divisors: 1 3 9 49169 147507 442521