642012 has 24 divisors (see below), whose sum is σ = 1712256. Its totient is φ = 183408.

The previous prime is 642011. The next prime is 642013. The reversal of 642012 is 210246.

It is an interprime number because it is at equal distance from previous prime (642011) and next prime (642013).

It is a junction number, because it is equal to n+sod(n) for n = 641982 and 642000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3738 + ... + 3905.

It is an arithmetic number, because the mean of its divisors is an integer number (71344).

2⁶⁴²⁰¹² is an apocalyptic number.

It is an amenable number.

642012 is an abundant number, since it is smaller than the sum of its proper divisors (1070244).

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

642012 is a wasteful number, since it uses less digits than its factorization.

642012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657 (or 7655 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 642012 is about 801.2565132341. The cubic root of 642012 is about 86.2675998530.

Adding to 642012 its reverse (210246), we get a palindrome (852258).

The spelling of 642012 in words is "six hundred forty-two thousand, twelve".