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139712 = 263759
BaseRepresentation
bin100010000111000000
321002122112
4202013000
513432322
62554452
71121216
oct420700
9232575
10139712
1195a71
1268a28
134b791
1438cb6
152b5e2
hex221c0

139712 has 28 divisors (see below), whose sum is σ = 289560. Its totient is φ = 66816.

The previous prime is 139709. The next prime is 139721. The reversal of 139712 is 217931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2339 + ... + 2397.

2139712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144780).

139712 is an abundant number, since it is smaller than the sum of its proper divisors (149848).

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

139712 is an equidigital number, since it uses as much as digits as its factorization.

139712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 98 counting only the distinct ones).

The product of its digits is 378, while the sum is 23.

The square root of 139712 is about 373.7806843592. The cubic root of 139712 is about 51.8893109014.

The spelling of 139712 in words is "one hundred thirty-nine thousand, seven hundred twelve".

Divisors: 1 2 4 8 16 32 37 59 64 74 118 148 236 296 472 592 944 1184 1888 2183 2368 3776 4366 8732 17464 34928 69856 139712