512545421 has 8 divisors (see below), whose sum is σ = 514529400. Its totient is φ = 510566400.

The previous prime is 512545399. The next prime is 512545433. The reversal of 512545421 is 124545215.

It can be written as a sum of positive squares in 4 ways, for example, as 19483396 + 493062025 = 4414^2 + 22205^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512545421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512545021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461615 + ... + 462723.

It is an arithmetic number, because the mean of its divisors is an integer number (64316175).

Almost surely, 2^512545421 is an apocalyptic number.

It is an amenable number.

512545421 is a deficient number, since it is larger than the sum of its proper divisors (1983979).

512545421 is a wasteful number, since it uses less digits than its factorization.

512545421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479.

The product of its digits is 8000, while the sum is 29.

The square root of 512545421 is about 22639.4660051866. The cubic root of 512545421 is about 800.2839726250.

The spelling of 512545421 in words is "five hundred twelve million, five hundred forty-five thousand, four hundred twenty-one".