501387 has 8 divisors (see below), whose sum is σ = 686736. Its totient is φ = 325152.

The previous prime is 501383. The next prime is 501401. The reversal of 501387 is 783105.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 501387 - 2² = 501383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501383) 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, 2148 + ... + 2369.

It is an arithmetic number, because the mean of its divisors is an integer number (85842).

2⁵⁰¹³⁸⁷ is an apocalyptic number.

501387 is a deficient number, since it is larger than the sum of its proper divisors (185349).

501387 is a wasteful number, since it uses less digits than its factorization.

501387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 501387 is about 708.0868590787. The cubic root of 501387 is about 79.4433756827.

It can be divided in two parts, 501 and 387, that added together give a palindrome (888).

The spelling of 501387 in words is "five hundred one thousand, three hundred eighty-seven".