401002505 has 32 divisors (see below), whose sum is σ = 523635840. Its totient is φ = 293829120.

The previous prime is 401002501. The next prime is 401002513. The reversal of 401002505 is 505200104.

401002505 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 401002505 - 2² = 401002501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401002501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367010 + ... + 368100.

It is an arithmetic number, because the mean of its divisors is an integer number (16363620).

Almost surely, 2^401002505 is an apocalyptic number.

It is an amenable number.

401002505 is a deficient number, since it is larger than the sum of its proper divisors (122633335).

401002505 is a wasteful number, since it uses less digits than its factorization.

401002505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 401002505 is about 20025.0469412683. The cubic root of 401002505 is about 737.4213295381.

Adding to 401002505 its reverse (505200104), we get a palindrome (906202609).

The spelling of 401002505 in words is "four hundred one million, two thousand, five hundred five".