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349521 = 3116507
BaseRepresentation
bin1010101010101010001
3122202110020
41111111101
542141041
611254053
72654004
oct1252521
9582406
10349521
11219667
1214a329
13c3123
149153b
156d866
hex55551

349521 has 4 divisors (see below), whose sum is σ = 466032. Its totient is φ = 233012.

The previous prime is 349519. The next prime is 349529. The reversal of 349521 is 125943.

349521 = T188 + T189 + ... + T205.

349521 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125943 = 341981.

It is a cyclic number.

It is not a de Polignac number, because 349521 - 21 = 349519 is a prime.

It is a D-number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 349491 and 349500.

It is not an unprimeable number, because it can be changed into a prime (349529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58251 + ... + 58256.

It is an arithmetic number, because the mean of its divisors is an integer number (116508).

349521 is a Friedman number, since it can be written as (4^(9+1)+2)/3-5, using all its digits and the basic arithmetic operations.

2349521 is an apocalyptic number.

It is an amenable number.

349521 is a deficient number, since it is larger than the sum of its proper divisors (116511).

349521 is a wasteful number, since it uses less digits than its factorization.

349521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116510.

The product of its digits is 1080, while the sum is 24.

The square root of 349521 is about 591.2030108178. The cubic root of 349521 is about 70.4408235377.

The spelling of 349521 in words is "three hundred forty-nine thousand, five hundred twenty-one".

Divisors: 1 3 116507 349521