7061881 has 6 divisors (see below), whose sum is σ = 7240046. Its totient is φ = 6888000.

The previous prime is 7061869. The next prime is 7061917. The reversal of 7061881 is 1881607.

It can be written as a sum of positive squares in 3 ways, for example, as 1301881 + 5760000 = 1141^2 + 2400^2 .

It is not a de Polignac number, because 7061881 - 2⁵ = 7061849 is a prime.

It is a super-2 number, since 2×7061881² = 99740326516322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7061861) 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 5 ways as a sum of consecutive naturals, for example, 420 + ... + 3781.

Almost surely, 2^7061881 is an apocalyptic number.

7061881 is the 1681-st heptagonal number.

It is an amenable number.

7061881 is a deficient number, since it is larger than the sum of its proper divisors (178165).

7061881 is an equidigital number, since it uses as much as digits as its factorization.

7061881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283 (or 4242 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 7061881 is about 2657.4199893882. The cubic root of 7061881 is about 191.8551515294.

The spelling of 7061881 in words is "seven million, sixty-one thousand, eight hundred eighty-one".