6399801 has 6 divisors (see below), whose sum is σ = 9244170. Its totient is φ = 4266528.

The previous prime is 6399797. The next prime is 6399817. The reversal of 6399801 is 1089936.

It can be written as a sum of positive squares in only one way, i.e., 5546025 + 853776 = 2355^2 + 924^2 .

It is not a de Polignac number, because 6399801 - 2² = 6399797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6399821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355536 + ... + 355553.

It is an arithmetic number, because the mean of its divisors is an integer number (1540695).

Almost surely, 2^6399801 is an apocalyptic number.

It is an amenable number.

6399801 is a deficient number, since it is larger than the sum of its proper divisors (2844369).

6399801 is a wasteful number, since it uses less digits than its factorization.

6399801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711095 (or 711092 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 6399801 is about 2529.7827970006. The cubic root of 6399801 is about 185.6616289992.

It can be divided in two parts, 639 and 9801, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 6399801 in words is "six million, three hundred ninety-nine thousand, eight hundred one".