2304561 has 8 divisors (see below), whose sum is σ = 3511744. Its totient is φ = 1316880.

The previous prime is 2304559. The next prime is 2304563. The reversal of 2304561 is 1654032.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2304559) and next prime (2304563).

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

It is not a de Polignac number, because 2304561 - 2¹ = 2304559 is a prime.

It is a super-2 number, since 2×2304561² = 10622002805442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 109741 = 2304561 / (2 + 3 + 0 + 4 + 5 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

2304561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2304563) 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, 54850 + ... + 54891.

It is an arithmetic number, because the mean of its divisors is an integer number (438968).

2^2304561 is an apocalyptic number.

2304561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2304561 is a deficient number, since it is larger than the sum of its proper divisors (1207183).

2304561 is a wasteful number, since it uses less digits than its factorization.

2304561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109751.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2304561 is about 1518.0780612340. The cubic root of 2304561 is about 132.0878088844.

Adding to 2304561 its reverse (1654032), we get a palindrome (3958593).

The spelling of 2304561 in words is "two million, three hundred four thousand, five hundred sixty-one".