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642039 = 31712589
BaseRepresentation
bin10011100101111110111
31012121201020
42130233313
5131021124
621432223
75312556
oct2345767
91177636
10642039
113a9412
1226b673
13196308
14129d9d
15ca379
hex9cbf7

642039 has 8 divisors (see below), whose sum is σ = 906480. Its totient is φ = 402816.

The previous prime is 642013. The next prime is 642049. The reversal of 642039 is 930246.

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

It is not a de Polignac number, because 642039 - 219 = 117751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642049) 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, 6244 + ... + 6345.

It is an arithmetic number, because the mean of its divisors is an integer number (113310).

2642039 is an apocalyptic number.

642039 is a deficient number, since it is larger than the sum of its proper divisors (264441).

642039 is a wasteful number, since it uses less digits than its factorization.

642039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12609.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 642039 is about 801.2733615939. The cubic root of 642039 is about 86.2688091724.

The spelling of 642039 in words is "six hundred forty-two thousand, thirty-nine".

Divisors: 1 3 17 51 12589 37767 214013 642039