2915561 has 8 divisors (see below), whose sum is σ = 3196800. Its totient is φ = 2637040.

The previous prime is 2915557. The next prime is 2915587. The reversal of 2915561 is 1655192.

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

It is a cyclic number.

It is not a de Polignac number, because 2915561 - 2² = 2915557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2915501) 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, 2075 + ... + 3183.

It is an arithmetic number, because the mean of its divisors is an integer number (399600).

2^2915561 is an apocalyptic number.

It is an amenable number.

2915561 is a deficient number, since it is larger than the sum of its proper divisors (281239).

2915561 is a wasteful number, since it uses less digits than its factorization.

2915561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359.

The product of its digits is 2700, while the sum is 29.

The square root of 2915561 is about 1707.5013909218. The cubic root of 2915561 is about 142.8589248825.

The spelling of 2915561 in words is "two million, nine hundred fifteen thousand, five hundred sixty-one".