501142140 has 120 divisors (see below), whose sum is σ = 1594609632. Its totient is φ = 131725440.

The previous prime is 501142073. The next prime is 501142151. The reversal of 501142140 is 41241105.

It is a super-2 number, since 2×501142140² = 502286888967559200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 112842 + ... + 117198.

Almost surely, 2^501142140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501142140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797304816).

501142140 is an abundant number, since it is smaller than the sum of its proper divisors (1093467492).

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

501142140 is a wasteful number, since it uses less digits than its factorization.

501142140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449 (or 4438 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 501142140 is about 22386.2042338580. The cubic root of 501142140 is about 794.3044111488.

Adding to 501142140 its reverse (41241105), we get a palindrome (542383245).

The spelling of 501142140 in words is "five hundred one million, one hundred forty-two thousand, one hundred forty".