345865 has 16 divisors (see below), whose sum is σ = 474768. Its totient is φ = 239616.

The previous prime is 345853. The next prime is 345869. The reversal of 345865 is 568543.

It can be written as a sum of positive squares in 8 ways, for example, as 71289 + 274576 = 267^2 + 524^2 .

It is not a de Polignac number, because 345865 - 2¹¹ = 343817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 949 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (29673).

2³⁴⁵⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

345865 is a deficient number, since it is larger than the sum of its proper divisors (128903).

345865 is a wasteful number, since it uses less digits than its factorization.

345865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348.

The product of its digits is 14400, while the sum is 31.

The square root of 345865 is about 588.1028821558. The cubic root of 345865 is about 70.1943578174.

The spelling of 345865 in words is "three hundred forty-five thousand, eight hundred sixty-five".