401335001 has 2 divisors, whose sum is σ = 401335002. Its totient is φ = 401335000.

The previous prime is 401334971. The next prime is 401335003. The reversal of 401335001 is 100533104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299809225 + 101525776 = 17315^2 + 10076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401335001 is a prime.

It is a super-2 number, since 2×401335001² = 322139566055340002, which contains 22 as substring.

Together with 401335003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401335003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200667500 + 200667501.

It is an arithmetic number, because the mean of its divisors is an integer number (200667501).

Almost surely, 2^401335001 is an apocalyptic number.

It is an amenable number.

401335001 is a deficient number, since it is larger than the sum of its proper divisors (1).

401335001 is an equidigital number, since it uses as much as digits as its factorization.

401335001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 401335001 is about 20033.3472240662. The cubic root of 401335001 is about 737.6250871233.

Adding to 401335001 its reverse (100533104), we get a palindrome (501868105).

The spelling of 401335001 in words is "four hundred one million, three hundred thirty-five thousand, one".