512476421 has 4 divisors (see below), whose sum is σ = 513110700. Its totient is φ = 511842144.

The previous prime is 512476399. The next prime is 512476439. The reversal of 512476421 is 124674215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124674215 = 5 ⋅24934843.

It can be written as a sum of positive squares in 2 ways, for example, as 487084900 + 25391521 = 22070^2 + 5039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512476421 is a prime.

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 (512470421) 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, 315926 + ... + 317543.

It is an arithmetic number, because the mean of its divisors is an integer number (128277675).

Almost surely, 2^512476421 is an apocalyptic number.

It is an amenable number.

512476421 is a deficient number, since it is larger than the sum of its proper divisors (634279).

512476421 is an equidigital number, since it uses as much as digits as its factorization.

512476421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634278.

The product of its digits is 13440, while the sum is 32.

The square root of 512476421 is about 22637.9420663628. The cubic root of 512476421 is about 800.2480590130.

The spelling of 512476421 in words is "five hundred twelve million, four hundred seventy-six thousand, four hundred twenty-one".