6464250 has 144 divisors (see below), whose sum is σ = 20040696. Its totient is φ = 1497600.

The previous prime is 6464221. The next prime is 6464261. The reversal of 6464250 is 524646.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 1252161 + 5212089 = 1119^2 + 2283^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 380242 + ... + 380258.

Almost surely, 2^6464250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6464250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10020348).

6464250 is an abundant number, since it is smaller than the sum of its proper divisors (13576446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6464250 is a wasteful number, since it uses less digits than its factorization.

6464250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6464250 is about 2542.4889380290. The cubic root of 6464250 is about 186.2827817919.

Adding to 6464250 its reverse (524646), we get a palindrome (6988896).

The spelling of 6464250 in words is "six million, four hundred sixty-four thousand, two hundred fifty".