345641 has 4 divisors (see below), whose sum is σ = 346884. Its totient is φ = 344400.

The previous prime is 345637. The next prime is 345643. The reversal of 345641 is 146543.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 32041 + 313600 = 179^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 345641 - 2² = 345637 is a prime.

It is a d-powerful number, because it can be written as 3³ + 4² + 6⁷ + 5³ + 4⁸ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345643) 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, 11 + ... + 831.

It is an arithmetic number, because the mean of its divisors is an integer number (86721).

2³⁴⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

345641 is a deficient number, since it is larger than the sum of its proper divisors (1243).

345641 is an equidigital number, since it uses as much as digits as its factorization.

345641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242.

The product of its digits is 1440, while the sum is 23.

The square root of 345641 is about 587.9124084419. The cubic root of 345641 is about 70.1792007168.

The spelling of 345641 in words is "three hundred forty-five thousand, six hundred forty-one".