2181077 has 4 divisors (see below), whose sum is σ = 2234316. Its totient is φ = 2127840.

The previous prime is 2181073. The next prime is 2181079. The reversal of 2181077 is 7701812.

2181077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 707281 + 1473796 = 841^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181077 - 2² = 2181073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181071) 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, 26558 + ... + 26639.

It is an arithmetic number, because the mean of its divisors is an integer number (558579).

2^2181077 is an apocalyptic number.

It is an amenable number.

2181077 is a deficient number, since it is larger than the sum of its proper divisors (53239).

2181077 is an equidigital number, since it uses as much as digits as its factorization.

2181077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53238.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 2181077 is about 1476.8469792094. The cubic root of 2181077 is about 129.6851750781.

Adding to 2181077 its reverse (7701812), we get a palindrome (9882889).

The spelling of 2181077 in words is "two million, one hundred eighty-one thousand, seventy-seven".