7533681 has 16 divisors (see below), whose sum is σ = 10480704. Its totient is φ = 4809024.

The previous prime is 7533667. The next prime is 7533689. The reversal of 7533681 is 1863357.

It is a happy number.

7533681 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 7533681 - 2⁷ = 7533553 is a prime.

It is a super-2 number, since 2×7533681² = 113512698819522, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7533689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6931 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (655044).

Almost surely, 2^7533681 is an apocalyptic number.

It is an amenable number.

7533681 is a deficient number, since it is larger than the sum of its proper divisors (2947023).

7533681 is a wasteful number, since it uses less digits than its factorization.

7533681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its digits is 15120, while the sum is 33.

The square root of 7533681 is about 2744.7551803394. The cubic root of 7533681 is about 196.0359593193.

The spelling of 7533681 in words is "seven million, five hundred thirty-three thousand, six hundred eighty-one".