401500001 has 16 divisors (see below), whose sum is σ = 483624960. Its totient is φ = 325613520.

The previous prime is 401499997. The next prime is 401500007. The reversal of 401500001 is 100005104.

It is a cyclic number.

It is not a de Polignac number, because 401500001 - 2² = 401499997 is a prime.

It is a super-2 number, since 2×401500001² = 322404501606000002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401500007) 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, 143720 + ... + 146486.

It is an arithmetic number, because the mean of its divisors is an integer number (30226560).

Almost surely, 2^401500001 is an apocalyptic number.

It is an amenable number.

401500001 is a deficient number, since it is larger than the sum of its proper divisors (82124959).

401500001 is a wasteful number, since it uses less digits than its factorization.

401500001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 401500001 is about 20037.4649344671. The cubic root of 401500001 is about 737.7261593478.

Adding to 401500001 its reverse (100005104), we get a palindrome (501505105).

The spelling of 401500001 in words is "four hundred one million, five hundred thousand, one".