6450000 has 120 divisors (see below), whose sum is σ = 21311136. Its totient is φ = 1680000.

The previous prime is 6449923. The next prime is 6450007. The reversal of 6450000 is 546.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149979 + ... + 150021.

Almost surely, 2^6450000 is an apocalyptic number.

6450000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10655568).

6450000 is an abundant number, since it is smaller than the sum of its proper divisors (14861136).

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

6450000 is an equidigital number, since it uses as much as digits as its factorization.

6450000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 6450000 is about 2539.6850198401. The cubic root of 6450000 is about 186.1457985064.

Adding to 6450000 its reverse (546), we get a palindrome (6450546).

It can be divided in two parts, 64 and 50000, that multiplied together give a 5-th power (3200000 = 20⁵).

The spelling of 6450000 in words is "six million, four hundred fifty thousand".