6625281 has 16 divisors (see below), whose sum is σ = 10015040. Its totient is φ = 3862080.

The previous prime is 6625273. The next prime is 6625301. The reversal of 6625281 is 1825266.

It is not a de Polignac number, because 6625281 - 2³ = 6625273 is a prime.

It is a super-2 number, since 2×6625281² = 87788696657922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

6625281 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6625181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3730 + ... + 5211.

It is an arithmetic number, because the mean of its divisors is an integer number (625940).

Almost surely, 2^6625281 is an apocalyptic number.

It is an amenable number.

6625281 is a deficient number, since it is larger than the sum of its proper divisors (3389759).

6625281 is a wasteful number, since it uses less digits than its factorization.

6625281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8976.

The product of its digits is 5760, while the sum is 30.

The square root of 6625281 is about 2573.9621209334. The cubic root of 6625281 is about 187.8169430604.

The spelling of 6625281 in words is "six million, six hundred twenty-five thousand, two hundred eighty-one".