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345661 = 1720333
BaseRepresentation
bin1010100011000111101
3122120011021
41110120331
542030121
611224141
72636521
oct1243075
9576137
10345661
11216778
12148051
13c1444
148dd81
156c641
hex5463d

345661 has 4 divisors (see below), whose sum is σ = 366012. Its totient is φ = 325312.

The previous prime is 345659. The next prime is 345673. The reversal of 345661 is 166543.

345661 = 562 + 572 + ... + 1062.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 308025 + 37636 = 555^2 + 194^2 .

It is not a de Polignac number, because 345661 - 21 = 345659 is a prime.

It is a d-powerful number, because it can be written as 33 + 48 + 62 + 53 + 67 + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345601) 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, 10150 + ... + 10183.

It is an arithmetic number, because the mean of its divisors is an integer number (91503).

2345661 is an apocalyptic number.

It is an amenable number.

345661 is a deficient number, since it is larger than the sum of its proper divisors (20351).

345661 is a wasteful number, since it uses less digits than its factorization.

345661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20350.

The product of its digits is 2160, while the sum is 25.

The square root of 345661 is about 587.9294175324. The cubic root of 345661 is about 70.1805542956.

The spelling of 345661 in words is "three hundred forty-five thousand, six hundred sixty-one".

Divisors: 1 17 20333 345661