501455 has 4 divisors (see below), whose sum is σ = 601752. Its totient is φ = 401160.

The previous prime is 501451. The next prime is 501463. The reversal of 501455 is 554105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554105 = 5 ⋅110821.

It is not a de Polignac number, because 501455 - 2² = 501451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 501455.

It is not an unprimeable number, because it can be changed into a prime (501451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50141 + ... + 50150.

It is an arithmetic number, because the mean of its divisors is an integer number (150438).

2⁵⁰¹⁴⁵⁵ is an apocalyptic number.

501455 is a deficient number, since it is larger than the sum of its proper divisors (100297).

501455 is a wasteful number, since it uses less digits than its factorization.

501455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100296.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 501455 is about 708.1348741589. The cubic root of 501455 is about 79.4469669906.

Subtracting 501455 from its reverse (554105), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 501455 in words is "five hundred one thousand, four hundred fifty-five".