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642283 = 3717359
BaseRepresentation
bin10011100110011101011
31012122001021
42130303223
5131023113
621433311
75313355
oct2346353
91178037
10642283
113a9614
1226b837
13196465
1412a0d5
15ca48d
hex9cceb

642283 has 4 divisors (see below), whose sum is σ = 659680. Its totient is φ = 624888.

The previous prime is 642281. The next prime is 642359. The reversal of 642283 is 382246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 382246 = 2191123.

It is a cyclic number.

It is not a de Polignac number, because 642283 - 21 = 642281 is a prime.

It is a d-powerful number, because it can be written as 6 + 48 + 2 + 219 + 85 + 39 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8643 + ... + 8716.

It is an arithmetic number, because the mean of its divisors is an integer number (164920).

2642283 is an apocalyptic number.

642283 is a deficient number, since it is larger than the sum of its proper divisors (17397).

642283 is a wasteful number, since it uses less digits than its factorization.

642283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17396.

The product of its digits is 2304, while the sum is 25.

The square root of 642283 is about 801.4256047819. The cubic root of 642283 is about 86.2797362985.

The spelling of 642283 in words is "six hundred forty-two thousand, two hundred eighty-three".

Divisors: 1 37 17359 642283