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642313 = 7891031
BaseRepresentation
bin10011100110100001001
31012122002101
42130310021
5131023223
621433401
75313430
oct2346411
91178071
10642313
113a9641
1226b861
13196489
1412a117
hex9cd09

642313 has 8 divisors (see below), whose sum is σ = 743040. Its totient is φ = 543840.

The previous prime is 642281. The next prime is 642359. The reversal of 642313 is 313246.

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

It is a cyclic number.

It is not a de Polignac number, because 642313 - 25 = 642281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642373) 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, 108 + ... + 1138.

It is an arithmetic number, because the mean of its divisors is an integer number (92880).

2642313 is an apocalyptic number.

It is an amenable number.

642313 is a deficient number, since it is larger than the sum of its proper divisors (100727).

642313 is a wasteful number, since it uses less digits than its factorization.

642313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its digits is 432, while the sum is 19.

The square root of 642313 is about 801.4443212102. Note that the first 3 decimals coincide. The cubic root of 642313 is about 86.2810796066.

Adding to 642313 its reverse (313246), we get a palindrome (955559).

The spelling of 642313 in words is "six hundred forty-two thousand, three hundred thirteen".

Divisors: 1 7 89 623 1031 7217 91759 642313