504097021 has 4 divisors (see below), whose sum is σ = 504914652. Its totient is φ = 503279392.

The previous prime is 504097001. The next prime is 504097067. The reversal of 504097021 is 120790405.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237591396 + 266505625 = 15414^2 + 16325^2 .

It is a cyclic number.

It is not a de Polignac number, because 504097021 - 2¹¹ = 504094973 is a prime.

It is a super-2 number, since 2×504097021² = 508227613162148882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504097001) 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, 407890 + ... + 409123.

It is an arithmetic number, because the mean of its divisors is an integer number (126228663).

Almost surely, 2^504097021 is an apocalyptic number.

It is an amenable number.

504097021 is a deficient number, since it is larger than the sum of its proper divisors (817631).

504097021 is an equidigital number, since it uses as much as digits as its factorization.

504097021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817630.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 504097021 is about 22452.1050460753. The cubic root of 504097021 is about 795.8625033967.

The spelling of 504097021 in words is "five hundred four million, ninety-seven thousand, twenty-one".