501401 has 2 divisors, whose sum is σ = 501402. Its totient is φ = 501400.

The previous prime is 501383. The next prime is 501409. The reversal of 501401 is 104105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491401 + 10000 = 701^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501401 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 501401.

It is not a weakly prime, because it can be changed into another prime (501409) 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 as a sum of consecutive naturals, namely, 250700 + 250701.

It is an arithmetic number, because the mean of its divisors is an integer number (250701).

2⁵⁰¹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

501401 is a deficient number, since it is larger than the sum of its proper divisors (1).

501401 is an equidigital number, since it uses as much as digits as its factorization.

501401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 501401 is about 708.0967448026. The cubic root of 501401 is about 79.4441150962. Note that the first 3 decimals are identical.

Adding to 501401 its reverse (104105), we get a palindrome (605506).

The spelling of 501401 in words is "five hundred one thousand, four hundred one".