501145 has 8 divisors (see below), whose sum is σ = 610056. Its totient is φ = 395136.

The previous prime is 501139. The next prime is 501157. The reversal of 501145 is 541105.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 205209 + 295936 = 453^2 + 544^2 .

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

It is a 3-Lehmer number, since φ(501145) divides (501145-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501145 is a prime.

It is a super-2 number, since 2×501145² = 502292622050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 322 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (76257).

2⁵⁰¹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

501145 is a deficient number, since it is larger than the sum of its proper divisors (108911).

501145 is a wasteful number, since it uses less digits than its factorization.

501145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 501145 is about 707.9159554636. The cubic root of 501145 is about 79.4305922168.

It can be divided in two parts, 501 and 145, that added together give a palindrome (646).

The spelling of 501145 in words is "five hundred one thousand, one hundred forty-five".