512402421 has 8 divisors (see below), whose sum is σ = 706762080. Its totient is φ = 329822192.

The previous prime is 512402353. The next prime is 512402437. The reversal of 512402421 is 124204215.

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

It is a cyclic number.

It is not a de Polignac number, because 512402421 - 2¹¹ = 512400373 is a prime.

It is a super-2 number, since 2×512402421² = 525112482093322482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512402021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2944755 + ... + 2944928.

It is an arithmetic number, because the mean of its divisors is an integer number (88345260).

Almost surely, 2^512402421 is an apocalyptic number.

It is an amenable number.

512402421 is a deficient number, since it is larger than the sum of its proper divisors (194359659).

512402421 is a wasteful number, since it uses less digits than its factorization.

512402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889715.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 512402421 is about 22636.3075831727. The cubic root of 512402421 is about 800.2095393826.

Adding to 512402421 its reverse (124204215), we get a palindrome (636606636).

The spelling of 512402421 in words is "five hundred twelve million, four hundred two thousand, four hundred twenty-one".