506857421 has 12 divisors (see below), whose sum is σ = 590073120. Its totient is φ = 434107800.

The previous prime is 506857411. The next prime is 506857423. The reversal of 506857421 is 124758605.

It is not a de Polignac number, because 506857421 - 2¹⁰ = 506856397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506857423) 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, 74096 + ... + 80646.

It is an arithmetic number, because the mean of its divisors is an integer number (49172760).

Almost surely, 2^506857421 is an apocalyptic number.

It is an amenable number.

506857421 is a deficient number, since it is larger than the sum of its proper divisors (83215699).

506857421 is a wasteful number, since it uses less digits than its factorization.

506857421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8144 (or 8137 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 506857421 is about 22513.4941979249. The cubic root of 506857421 is about 797.3125556000.

The spelling of 506857421 in words is "five hundred six million, eight hundred fifty-seven thousand, four hundred twenty-one".