2180461 has 4 divisors (see below), whose sum is σ = 2184732. Its totient is φ = 2176192.

The previous prime is 2180417. The next prime is 2180467. The reversal of 2180461 is 1640812.

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 1550025 + 630436 = 1245^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 2180461 - 2⁷ = 2180333 is a prime.

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 (2180467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (546183).

2^2180461 is an apocalyptic number.

It is an amenable number.

2180461 is a deficient number, since it is larger than the sum of its proper divisors (4271).

2180461 is an equidigital number, since it uses as much as digits as its factorization.

2180461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2180461 is about 1476.6384120698. The cubic root of 2180461 is about 129.6729649651.

The spelling of 2180461 in words is "two million, one hundred eighty thousand, four hundred sixty-one".