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194425 = 52711101
BaseRepresentation
bin101111011101111001
3100212200221
4233131321
522210200
64100041
71436560
oct573571
9325627
10194425
11123090
1294621
136a65a
1450bd7
153c91a
hex2f779

194425 has 24 divisors (see below), whose sum is σ = 303552. Its totient is φ = 120000.

The previous prime is 194413. The next prime is 194431. The reversal of 194425 is 524491.

194425 divided by its sum of digits (25) gives a palindrome (7777).

It can be divided in two parts, 19 and 4425, that added together give a palindrome (4444).

194425 = T29 + T30 + ... + T105.

It is not a de Polignac number, because 194425 - 211 = 192377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1875 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (12648).

194425 is a Friedman number, since it can be written as 21^4-(9+5)*4, using all its digits and the basic arithmetic operations.

2194425 is an apocalyptic number.

It is an amenable number.

194425 is a deficient number, since it is larger than the sum of its proper divisors (109127).

194425 is a wasteful number, since it uses less digits than its factorization.

194425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 124 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 194425 is about 440.9365033653. The cubic root of 194425 is about 57.9318462245.

The spelling of 194425 in words is "one hundred ninety-four thousand, four hundred twenty-five".

Divisors: 1 5 7 11 25 35 55 77 101 175 275 385 505 707 1111 1925 2525 3535 5555 7777 17675 27775 38885 194425