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209742 = 23132689
BaseRepresentation
bin110011001101001110
3101122201020
4303031032
523202432
64255010
71532331
oct631516
9348636
10209742
11133645
12a1466
1374610
1456618
154222c
hex3334e

209742 has 16 divisors (see below), whose sum is σ = 451920. Its totient is φ = 64512.

The previous prime is 209719. The next prime is 209743. The reversal of 209742 is 247902.

209742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209743) 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, 1267 + ... + 1422.

It is an arithmetic number, because the mean of its divisors is an integer number (28245).

2209742 is an apocalyptic number.

209742 is an abundant number, since it is smaller than the sum of its proper divisors (242178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209742 is a wasteful number, since it uses less digits than its factorization.

209742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 209742 is about 457.9759819030. The cubic root of 209742 is about 59.4148677767.

The spelling of 209742 in words is "two hundred nine thousand, seven hundred forty-two".

Divisors: 1 2 3 6 13 26 39 78 2689 5378 8067 16134 34957 69914 104871 209742