6425549 has 12 divisors (see below), whose sum is σ = 7029396. Its totient is φ = 5870592.

The previous prime is 6425543. The next prime is 6425567. The reversal of 6425549 is 9455246.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 265225 + 6160324 = 515^2 + 2482^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6425549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6425543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32519 + ... + 32715.

It is an arithmetic number, because the mean of its divisors is an integer number (585783).

Almost surely, 2^6425549 is an apocalyptic number.

It is an amenable number.

6425549 is a deficient number, since it is larger than the sum of its proper divisors (603847).

6425549 is a wasteful number, since it uses less digits than its factorization.

6425549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 403 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 6425549 is about 2534.8666631600. The cubic root of 6425549 is about 185.9102835526.

The spelling of 6425549 in words is "six million, four hundred twenty-five thousand, five hundred forty-nine".