501421201 has 4 divisors (see below), whose sum is σ = 506289472. Its totient is φ = 496552932.

The previous prime is 501421189. The next prime is 501421243. The reversal of 501421201 is 102124105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 501421201 - 2⁷ = 501421073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501421301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2433981 + ... + 2434186.

It is an arithmetic number, because the mean of its divisors is an integer number (126572368).

Almost surely, 2^501421201 is an apocalyptic number.

It is an amenable number.

501421201 is a deficient number, since it is larger than the sum of its proper divisors (4868271).

501421201 is a wasteful number, since it uses less digits than its factorization.

501421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868270.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 501421201 is about 22392.4362453039. The cubic root of 501421201 is about 794.4518199274.

Adding to 501421201 its reverse (102124105), we get a palindrome (603545306).

The spelling of 501421201 in words is "five hundred one million, four hundred twenty-one thousand, two hundred one".