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642533 is a prime number
BaseRepresentation
bin10011100110111100101
31012122101112
42130313211
5131030113
621434405
75314163
oct2346745
91178345
10642533
113a9821
1226ba05
131965c8
1412a233
15ca5a8
hex9cde5

642533 has 2 divisors, whose sum is σ = 642534. Its totient is φ = 642532.

The previous prime is 642529. The next prime is 642547. The reversal of 642533 is 335246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605284 + 37249 = 778^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 642533 - 22 = 642529 is a prime.

It is a d-powerful number, because it can be written as 6 + 42 + 53 + 219 + 310 + 310 .

It is a junction number, because it is equal to n+sod(n) for n = 642499 and 642508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321266 + 321267.

It is an arithmetic number, because the mean of its divisors is an integer number (321267).

2642533 is an apocalyptic number.

It is an amenable number.

642533 is a deficient number, since it is larger than the sum of its proper divisors (1).

642533 is an equidigital number, since it uses as much as digits as its factorization.

642533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 23.

The square root of 642533 is about 801.5815616642. The cubic root of 642533 is about 86.2909292545.

Adding to 642533 its reverse (335246), we get a palindrome (977779).

The spelling of 642533 in words is "six hundred forty-two thousand, five hundred thirty-three".