642732 has 24 divisors (see below), whose sum is σ = 1579200. Its totient is φ = 202896.

The previous prime is 642701. The next prime is 642737. The reversal of 642732 is 237246.

It is a d-powerful number, because it can be written as 6² + 4 + 7⁶ + 2⁹ + 3⁵ + 2¹⁹ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642732.

It is not an unprimeable number, because it can be changed into a prime (642737) 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 7 ways as a sum of consecutive naturals, for example, 1182 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (65800).

2⁶⁴²⁷³² is an apocalyptic number.

It is an amenable number.

642732 is an abundant number, since it is smaller than the sum of its proper divisors (936468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642732 is a wasteful number, since it uses less digits than its factorization.

642732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845 (or 2843 counting only the distinct ones).

The product of its digits is 2016, while the sum is 24.

The square root of 642732 is about 801.7056816563. The cubic root of 642732 is about 86.2998367723.

Adding to 642732 its reverse (237246), we get a palindrome (879978).

The spelling of 642732 in words is "six hundred forty-two thousand, seven hundred thirty-two".