6401005 has 32 divisors (see below), whose sum is σ = 8951040. Its totient is φ = 4354560.

The previous prime is 6400987. The next prime is 6401011. The reversal of 6401005 is 5001046.

It is not a de Polignac number, because 6401005 - 2²¹ = 4303853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6401005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87649 + ... + 87721.

It is an arithmetic number, because the mean of its divisors is an integer number (279720).

Almost surely, 2^6401005 is an apocalyptic number.

6401005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6401005 is a deficient number, since it is larger than the sum of its proper divisors (2550035).

6401005 is a wasteful number, since it uses less digits than its factorization.

6401005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 6401005 is about 2530.0207509030. The cubic root of 6401005 is about 185.6732711625.

The spelling of 6401005 in words is "six million, four hundred one thousand, five".