501405605 has 8 divisors (see below), whose sum is σ = 616362264. Its totient is φ = 391340800.

The previous prime is 501405571. The next prime is 501405629. The reversal of 501405605 is 506504105.

It can be written as a sum of positive squares in 4 ways, for example, as 9541921 + 491863684 = 3089^2 + 22178^2 .

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

It is not a de Polignac number, because 501405605 - 2⁸ = 501405349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222736 + ... + 1223145.

It is an arithmetic number, because the mean of its divisors is an integer number (77045283).

Almost surely, 2^501405605 is an apocalyptic number.

It is an amenable number.

501405605 is a deficient number, since it is larger than the sum of its proper divisors (114956659).

501405605 is a wasteful number, since it uses less digits than its factorization.

501405605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445927.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 501405605 is about 22392.0880000057. The cubic root of 501405605 is about 794.4435830739.

The spelling of 501405605 in words is "five hundred one million, four hundred five thousand, six hundred five".