501421205 has 8 divisors (see below), whose sum is σ = 637099992. Its totient is φ = 377540608.

The previous prime is 501421189. The next prime is 501421243. The reversal of 501421205 is 502124105.

It can be written as a sum of positive squares in 4 ways, for example, as 95922436 + 405498769 = 9794^2 + 20137^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 501421205 - 2⁴ = 501421189 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, 2949452 + ... + 2949621.

It is an arithmetic number, because the mean of its divisors is an integer number (79637499).

Almost surely, 2^501421205 is an apocalyptic number.

It is an amenable number.

501421205 is a deficient number, since it is larger than the sum of its proper divisors (135678787).

501421205 is a wasteful number, since it uses less digits than its factorization.

501421205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899095.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 501421205 is about 22392.4363346198. The cubic root of 501421205 is about 794.4518220400.

The spelling of 501421205 in words is "five hundred one million, four hundred twenty-one thousand, two hundred five".