7055681 has 4 divisors (see below), whose sum is σ = 7064772. Its totient is φ = 7046592.

The previous prime is 7055677. The next prime is 7055701. The reversal of 7055681 is 1865507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4165681 + 2890000 = 2041^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 7055681 - 2² = 7055677 is a prime.

It is a super-2 number, since 2×7055681² = 99565268747522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7055611) 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 3 ways as a sum of consecutive naturals, for example, 3260 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (1766193).

Almost surely, 2^7055681 is an apocalyptic number.

It is an amenable number.

7055681 is a deficient number, since it is larger than the sum of its proper divisors (9091).

7055681 is an equidigital number, since it uses as much as digits as its factorization.

7055681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9090.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 7055681 is about 2656.2531882334. The cubic root of 7055681 is about 191.7989884845.

The spelling of 7055681 in words is "seven million, fifty-five thousand, six hundred eighty-one".