505374021 has 12 divisors (see below), whose sum is σ = 735734272. Its totient is φ = 334262376.

The previous prime is 505374013. The next prime is 505374029. The reversal of 505374021 is 120473505.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (505374013) and next prime (505374029).

It is not a de Polignac number, because 505374021 - 2³ = 505374013 is a prime.

It is a super-2 number, since 2×505374021² = 510805802203416882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505374029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219931 + ... + 222216.

Almost surely, 2^505374021 is an apocalyptic number.

It is an amenable number.

505374021 is a deficient number, since it is larger than the sum of its proper divisors (230360251).

505374021 is a wasteful number, since it uses less digits than its factorization.

505374021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442280 (or 442277 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 505374021 is about 22480.5253719747. The cubic root of 505374021 is about 796.5339742898.

The spelling of 505374021 in words is "five hundred five million, three hundred seventy-four thousand, twenty-one".