642674 has 8 divisors (see below), whose sum is σ = 967680. Its totient is φ = 320116.

The previous prime is 642673. The next prime is 642683. The reversal of 642674 is 476246.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642674.

It is not an unprimeable number, because it can be changed into a prime (642673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347 + ... + 1185.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2⁶⁴²⁶⁷⁴ is an apocalyptic number.

642674 is a deficient number, since it is larger than the sum of its proper divisors (325006).

642674 is a wasteful number, since it uses less digits than its factorization.

642674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224.

The product of its digits is 8064, while the sum is 29.

The square root of 642674 is about 801.6695079645. The cubic root of 642674 is about 86.2972408012.

The spelling of 642674 in words is "six hundred forty-two thousand, six hundred seventy-four".