2612561 has 8 divisors (see below), whose sum is σ = 3058944. Its totient is φ = 2184480.

The previous prime is 2612549. The next prime is 2612647. The reversal of 2612561 is 1652162.

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

It is not a de Polignac number, because 2612561 - 2⁶ = 2612497 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2612521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4265 + ... + 4838.

It is an arithmetic number, because the mean of its divisors is an integer number (382368).

2^2612561 is an apocalyptic number.

It is an amenable number.

2612561 is a deficient number, since it is larger than the sum of its proper divisors (446383).

2612561 is an equidigital number, since it uses as much as digits as its factorization.

2612561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151.

The product of its digits is 720, while the sum is 23.

The square root of 2612561 is about 1616.3418574052. The cubic root of 2612561 is about 137.7279700344.

The spelling of 2612561 in words is "two million, six hundred twelve thousand, five hundred sixty-one".