56671121 has 4 divisors (see below), whose sum is σ = 61030452. Its totient is φ = 52311792.

The previous prime is 56671117. The next prime is 56671123. The reversal of 56671121 is 12117665.

56671121 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 36966400 + 19704721 = 6080^2 + 4439^2 .

It is not a de Polignac number, because 56671121 - 2² = 56671117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56671123) 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 3 ways as a sum of consecutive naturals, for example, 2179646 + ... + 2179671.

It is an arithmetic number, because the mean of its divisors is an integer number (15257613).

Almost surely, 2^56671121 is an apocalyptic number.

It is an amenable number.

56671121 is a deficient number, since it is larger than the sum of its proper divisors (4359331).

56671121 is a wasteful number, since it uses less digits than its factorization.

56671121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4359330.

The product of its digits is 2520, while the sum is 29.

The square root of 56671121 is about 7528.0223830698. The cubic root of 56671121 is about 384.1085147059.

Adding to 56671121 its reverse (12117665), we get a palindrome (68788786).

The spelling of 56671121 in words is "fifty-six million, six hundred seventy-one thousand, one hundred twenty-one".