6525981 has 64 divisors (see below), whose sum is σ = 12503040. Its totient is φ = 3265920.

The previous prime is 6525979. The next prime is 6525991. The reversal of 6525981 is 1895256.

It is a happy number.

6525981 is a `hidden beast` number, since 65 + 2 + 598 + 1 = 666.

6525981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6525981 - 2¹ = 6525979 is a prime.

It is a super-2 number, since 2×6525981² = 85176856024722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6525901) 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 63 ways as a sum of consecutive naturals, for example, 89361 + ... + 89433.

It is an arithmetic number, because the mean of its divisors is an integer number (195360).

Almost surely, 2^6525981 is an apocalyptic number.

It is an amenable number.

6525981 is a deficient number, since it is larger than the sum of its proper divisors (5977059).

6525981 is a wasteful number, since it uses less digits than its factorization.

6525981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 137 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 6525981 is about 2554.5999686839. The cubic root of 6525981 is about 186.8738795174.

The spelling of 6525981 in words is "six million, five hundred twenty-five thousand, nine hundred eighty-one".