642702 has 16 divisors (see below), whose sum is σ = 1361232. Its totient is φ = 201600.

The previous prime is 642701. The next prime is 642737. The reversal of 642702 is 207246.

It is a happy number.

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 642702.

It is not an unprimeable number, because it can be changed into a prime (642701) 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, 3049 + ... + 3252.

It is an arithmetic number, because the mean of its divisors is an integer number (85077).

2⁶⁴²⁷⁰² is an apocalyptic number.

642702 is an abundant number, since it is smaller than the sum of its proper divisors (718530).

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

642702 is a wasteful number, since it uses less digits than its factorization.

642702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 642702 is about 801.6869713298. The cubic root of 642702 is about 86.2984940482.

Adding to 642702 its reverse (207246), we get a palindrome (849948).

The spelling of 642702 in words is "six hundred forty-two thousand, seven hundred two".