2656481 has 4 divisors (see below), whose sum is σ = 2663700. Its totient is φ = 2649264.

The previous prime is 2656457. The next prime is 2656499. The reversal of 2656481 is 1846562.

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 1018081 + 1638400 = 1009^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656481 - 2⁶ = 2656417 is a prime.

It is a super-2 number, since 2×2656481² = 14113782606722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2656441) 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, 3026 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (665925).

2^2656481 is an apocalyptic number.

It is an amenable number.

2656481 is a deficient number, since it is larger than the sum of its proper divisors (7219).

2656481 is an equidigital number, since it uses as much as digits as its factorization.

2656481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7218.

The product of its digits is 11520, while the sum is 32.

The square root of 2656481 is about 1629.8714673250. The cubic root of 2656481 is about 138.4954709254.

The spelling of 2656481 in words is "two million, six hundred fifty-six thousand, four hundred eighty-one".