340651 has 4 divisors (see below), whose sum is σ = 358600. Its totient is φ = 322704.

The previous prime is 340649. The next prime is 340657. The reversal of 340651 is 156043.

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

It is a cyclic number.

It is not a de Polignac number, because 340651 - 2¹ = 340649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 17929 = 340651 / (3 + 4 + 0 + 6 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340657) 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, 8946 + ... + 8983.

It is an arithmetic number, because the mean of its divisors is an integer number (89650).

2³⁴⁰⁶⁵¹ is an apocalyptic number.

340651 is a deficient number, since it is larger than the sum of its proper divisors (17949).

340651 is a wasteful number, since it uses less digits than its factorization.

340651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17948.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 340651 is about 583.6531504241. The cubic root of 340651 is about 69.8398379055.

Adding to 340651 its reverse (156043), we get a palindrome (496694).

The spelling of 340651 in words is "three hundred forty thousand, six hundred fifty-one".