506128001 has 4 divisors (see below), whose sum is σ = 507995904. Its totient is φ = 504260100.

The previous prime is 506127997. The next prime is 506128003. The reversal of 506128001 is 100821605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100821605 = 5 ⋅20164321.

It is a cyclic number.

It is not a de Polignac number, because 506128001 - 2² = 506127997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506128003) 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, 933545 + ... + 934086.

It is an arithmetic number, because the mean of its divisors is an integer number (126998976).

Almost surely, 2^506128001 is an apocalyptic number.

It is an amenable number.

506128001 is a deficient number, since it is larger than the sum of its proper divisors (1867903).

506128001 is a wasteful number, since it uses less digits than its factorization.

506128001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867902.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 506128001 is about 22497.2887477580. The cubic root of 506128001 is about 796.9299003693.

Adding to 506128001 its reverse (100821605), we get a palindrome (606949606).

The spelling of 506128001 in words is "five hundred six million, one hundred twenty-eight thousand, one".