642346 has 8 divisors (see below), whose sum is σ = 967140. Its totient is φ = 319968.

The previous prime is 642281. The next prime is 642359. The reversal of 642346 is 643246.

642346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 585225 + 57121 = 765^2 + 239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 642346.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390 + ... + 1198.

2⁶⁴²³⁴⁶ is an apocalyptic number.

642346 is a deficient number, since it is larger than the sum of its proper divisors (324794).

642346 is a wasteful number, since it uses less digits than its factorization.

642346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

The product of its digits is 3456, while the sum is 25.

The square root of 642346 is about 801.4649087764. The cubic root of 642346 is about 86.2825571971.

Subtracting 642346 from its reverse (643246), we obtain a square (900 = 30²).

The spelling of 642346 in words is "six hundred forty-two thousand, three hundred forty-six".