2161504 has 12 divisors (see below), whose sum is σ = 4255524. Its totient is φ = 1080736.

The previous prime is 2161493. The next prime is 2161513. The reversal of 2161504 is 4051612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33742 + ... + 33805.

It is an arithmetic number, because the mean of its divisors is an integer number (354627).

2^2161504 is an apocalyptic number.

It is an amenable number.

2161504 is a deficient number, since it is larger than the sum of its proper divisors (2094020).

2161504 is an equidigital number, since it uses as much as digits as its factorization.

2161504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67557 (or 67549 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2161504 is about 1470.2054278229. The cubic root of 2161504 is about 129.2960769390.

The spelling of 2161504 in words is "two million, one hundred sixty-one thousand, five hundred four".