6449625 has 120 divisors (see below), whose sum is σ = 15063048. Its totient is φ = 2721600.

The previous prime is 6449617. The next prime is 6449659. The reversal of 6449625 is 5269446.

6449625 is a `hidden beast` number, since 644 + 9 + 6 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1016064 + 5433561 = 1008^2 + 2331^2 .

It is not a de Polignac number, because 6449625 - 2³ = 6449617 is a prime.

It is an Ulam number.

Its product of digits (51840) is a multiple of the sum of its prime factors (54).

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 6449625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 496119 + ... + 496131.

Almost surely, 2^6449625 is an apocalyptic number.

6449625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6449625 is an abundant number, since it is smaller than the sum of its proper divisors (8613423).

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

6449625 is a wasteful number, since it uses less digits than its factorization.

6449625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 28 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 6449625 is about 2539.6111907140. The cubic root of 6449625 is about 186.1421909598.

The spelling of 6449625 in words is "six million, four hundred forty-nine thousand, six hundred twenty-five".