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345561 = 3229503
BaseRepresentation
bin1010100010111011001
3122120000120
41110113121
542024221
611223453
72636316
oct1242731
9576016
10345561
11216697
12147b89
13c1398
148dd0d
156c5c6
hex545d9

345561 has 8 divisors (see below), whose sum is σ = 463680. Its totient is φ = 228912.

The previous prime is 345551. The next prime is 345571. The reversal of 345561 is 165543.

345561 is nontrivially palindromic in base 15.

It is an interprime number because it is at equal distance from previous prime (345551) and next prime (345571).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 345561 - 213 = 337369 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (345511) 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, 436 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (57960).

2345561 is an apocalyptic number.

It is an amenable number.

345561 is a deficient number, since it is larger than the sum of its proper divisors (118119).

345561 is a wasteful number, since it uses less digits than its factorization.

345561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735.

The product of its digits is 1800, while the sum is 24.

The square root of 345561 is about 587.8443671585. The cubic root of 345561 is about 70.1737858796.

Adding to 345561 its product of digits (1800), we get a triangular number (347361 = T833).

The spelling of 345561 in words is "three hundred forty-five thousand, five hundred sixty-one".

Divisors: 1 3 229 503 687 1509 115187 345561