501942 has 64 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 124416.

The previous prime is 501931. The next prime is 501947. The reversal of 501942 is 249105.

501942 is a nontrivial binomial coefficient, being equal to C(38, 5).

It is a Harshad number since it is a multiple of its sum of digits (21).

501942 is an undulating number in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501947) by changing a digit.

501942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 31 ways as a sum of consecutive naturals, for example, 13548 + ... + 13584.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2⁵⁰¹⁹⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656640).

501942 is an abundant number, since it is smaller than the sum of its proper divisors (811338).

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

501942 is a wasteful number, since it uses less digits than its factorization.

501942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 501942 is about 708.4786517602. The cubic root of 501942 is about 79.4726776091.

The spelling of 501942 in words is "five hundred one thousand, nine hundred forty-two".