6401611 has 4 divisors (see below), whose sum is σ = 6440112. Its totient is φ = 6363112.

The previous prime is 6401609. The next prime is 6401621. The reversal of 6401611 is 1161046.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6401611 - 2¹ = 6401609 is a prime.

It is a Duffinian number.

6401611 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6401621) 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, 19000 + ... + 19333.

It is an arithmetic number, because the mean of its divisors is an integer number (1610028).

Almost surely, 2^6401611 is an apocalyptic number.

6401611 is a deficient number, since it is larger than the sum of its proper divisors (38501).

6401611 is a wasteful number, since it uses less digits than its factorization.

6401611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38500.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 6401611 is about 2530.1405099322. The cubic root of 6401611 is about 185.6791303701.

Adding to 6401611 its reverse (1161046), we get a palindrome (7562657).

The spelling of 6401611 in words is "six million, four hundred one thousand, six hundred eleven".