2240681 has 8 divisors (see below), whose sum is σ = 2320704. Its totient is φ = 2162160.

The previous prime is 2240669. The next prime is 2240699. The reversal of 2240681 is 1860422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2240681 is a prime.

It is a super-2 number, since 2×2240681² = 10041302687522, 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 (2245681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3236 + ... + 3866.

It is an arithmetic number, because the mean of its divisors is an integer number (290088).

2^2240681 is an apocalyptic number.

It is an amenable number.

2240681 is a deficient number, since it is larger than the sum of its proper divisors (80023).

2240681 is an equidigital number, since it uses as much as digits as its factorization.

2240681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2240681 is about 1496.8904435529. The cubic root of 2240681 is about 130.8559105650.

The spelling of 2240681 in words is "two million, two hundred forty thousand, six hundred eighty-one".