7061581 has 4 divisors (see below), whose sum is σ = 7117312. Its totient is φ = 7005852.

The previous prime is 7061569. The next prime is 7061591. The reversal of 7061581 is 1851607.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1851607 = 19 ⋅97453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7061581 is a prime.

It is a super-2 number, since 2×7061581² = 99731852439122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7061501) 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, 27675 + ... + 27928.

It is an arithmetic number, because the mean of its divisors is an integer number (1779328).

Almost surely, 2^7061581 is an apocalyptic number.

It is an amenable number.

7061581 is a deficient number, since it is larger than the sum of its proper divisors (55731).

7061581 is a wasteful number, since it uses less digits than its factorization.

7061581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55730.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 7061581 is about 2657.3635430629. The cubic root of 7061581 is about 191.8524347197.

The spelling of 7061581 in words is "seven million, sixty-one thousand, five hundred eighty-one".