345861 has 12 divisors (see below), whose sum is σ = 506688. Its totient is φ = 227304.

The previous prime is 345853. The next prime is 345869. The reversal of 345861 is 168543.

It is an interprime number because it is at equal distance from previous prime (345853) and next prime (345869).

It is not a de Polignac number, because 345861 - 2³ = 345853 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

345861 is a lucky number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 516 + ... + 978.

It is an arithmetic number, because the mean of its divisors is an integer number (42224).

2³⁴⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

345861 is a deficient number, since it is larger than the sum of its proper divisors (160827).

345861 is a wasteful number, since it uses less digits than its factorization.

345861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 549 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 345861 is about 588.0994813805. The cubic root of 345861 is about 70.1940872123.

The spelling of 345861 in words is "three hundred forty-five thousand, eight hundred sixty-one".