1641145001 has 4 divisors (see below), whose sum is σ = 1641405012. Its totient is φ = 1640884992.

The previous prime is 1641144983. The next prime is 1641145043. The reversal of 1641145001 is 1005411461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183738025 + 1457406976 = 13555^2 + 38176^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641145001 - 2⁶ = 1641144937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641145081) 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, 120296 + ... + 133241.

It is an arithmetic number, because the mean of its divisors is an integer number (410351253).

Almost surely, 2^1641145001 is an apocalyptic number.

It is an amenable number.

1641145001 is a deficient number, since it is larger than the sum of its proper divisors (260011).

1641145001 is an equidigital number, since it uses as much as digits as its factorization.

1641145001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260010.

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

The square root of 1641145001 is about 40511.0478881996. The cubic root of 1641145001 is about 1179.5480891845.

Adding to 1641145001 its reverse (1005411461), we get a palindrome (2646556462).

The spelling of 1641145001 in words is "one billion, six hundred forty-one million, one hundred forty-five thousand, one".