6399253 has 12 divisors (see below), whose sum is σ = 7550220. Its totient is φ = 5406912.

The previous prime is 6399251. The next prime is 6399269. The reversal of 6399253 is 3529936.

6399253 is a nontrivial binomial coefficient, being equal to C(3578, 2).

It can be written as a sum of positive squares in 2 ways, for example, as 5049009 + 1350244 = 2247^2 + 1162^2 .

It is not a de Polignac number, because 6399253 - 2¹ = 6399251 is a prime.

It is a d-powerful number, because it can be written as 6³ + 3⁹ + 9 + 9⁷ + 2¹¹ + 5 + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2683 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (629185).

Almost surely, 2^6399253 is an apocalyptic number.

6399253 is the 3577-th triangular number and also the 1789-th hexagonal number.

6399253 is the 1193-rd centered nonagonal number.

It is an amenable number.

6399253 is a deficient number, since it is larger than the sum of its proper divisors (1150967).

6399253 is a wasteful number, since it uses less digits than its factorization.

6399253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876 (or 1869 counting only the distinct ones).

The product of its digits is 43740, while the sum is 37.

The square root of 6399253 is about 2529.6744849881. The cubic root of 6399253 is about 185.6563295908.

The spelling of 6399253 in words is "six million, three hundred ninety-nine thousand, two hundred fifty-three".