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145000 = 235429
BaseRepresentation
bin100011011001101000
321100220101
4203121220
514120000
63035144
71142512
oct433150
9240811
10145000
1199a39
126bab4
1350ccb
143abb2
152ce6a
hex23668

145000 has 40 divisors (see below), whose sum is σ = 351450. Its totient is φ = 56000.

The previous prime is 144983. The next prime is 145007. The reversal of 145000 is 541.

It can be written as a sum of positive squares in 5 ways, for example, as 2116 + 142884 = 46^2 + 378^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (145007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4986 + ... + 5014.

2145000 is an apocalyptic number.

145000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175725).

145000 is an abundant number, since it is smaller than the sum of its proper divisors (206450).

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

145000 is an equidigital number, since it uses as much as digits as its factorization.

145000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 145000 is about 380.7886552932. The cubic root of 145000 is about 52.5358787249.

Adding to 145000 its reverse (541), we get a palindrome (145541).

The spelling of 145000 in words is "one hundred forty-five thousand".

Divisors: 1 2 4 5 8 10 20 25 29 40 50 58 100 116 125 145 200 232 250 290 500 580 625 725 1000 1160 1250 1450 2500 2900 3625 5000 5800 7250 14500 18125 29000 36250 72500 145000