1205050001 has 2 divisors, whose sum is σ = 1205050002. Its totient is φ = 1205050000.

The previous prime is 1205049991. The next prime is 1205050037. The reversal of 1205050001 is 1000505021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1154980225 + 50069776 = 33985^2 + 7076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205050001 - 2¹⁴ = 1205033617 is a prime.

It is a super-3 number, since 3×1205050001³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1205050051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602525000 + 602525001.

It is an arithmetic number, because the mean of its divisors is an integer number (602525001).

Almost surely, 2^1205050001 is an apocalyptic number.

It is an amenable number.

1205050001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205050001 is an equidigital number, since it uses as much as digits as its factorization.

1205050001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 1205050001 is about 34713.8301113548. The cubic root of 1205050001 is about 1064.1471570943.

Adding to 1205050001 its reverse (1000505021), we get a palindrome (2205555022).

The spelling of 1205050001 in words is "one billion, two hundred five million, fifty thousand, one".