506001621 has 16 divisors (see below), whose sum is σ = 685682624. Its totient is φ = 331841664.

The previous prime is 506001619. The next prime is 506001659. The reversal of 506001621 is 126100605.

It is a happy number.

It is not a de Polignac number, because 506001621 - 2¹ = 506001619 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 (506001721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206415 + ... + 208851.

It is an arithmetic number, because the mean of its divisors is an integer number (42855164).

Almost surely, 2^506001621 is an apocalyptic number.

It is an amenable number.

506001621 is a deficient number, since it is larger than the sum of its proper divisors (179681003).

506001621 is a wasteful number, since it uses less digits than its factorization.

506001621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 506001621 is about 22494.4797894950. The cubic root of 506001621 is about 796.8635638005.

The spelling of 506001621 in words is "five hundred six million, one thousand, six hundred twenty-one".