2906561 has 8 divisors (see below), whose sum is σ = 3336000. Its totient is φ = 2480688.

The previous prime is 2906549. The next prime is 2906567. The reversal of 2906561 is 1656092.

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

It is a de Polignac number, because none of the positive numbers 2^k-2906561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2906567) 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, 1190 + ... + 2688.

It is an arithmetic number, because the mean of its divisors is an integer number (417000).

2^2906561 is an apocalyptic number.

It is an amenable number.

2906561 is a deficient number, since it is larger than the sum of its proper divisors (429439).

2906561 is a wasteful number, since it uses less digits than its factorization.

2906561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2906561 is about 1704.8639241887. The cubic root of 2906561 is about 142.7117770364.

The spelling of 2906561 in words is "two million, nine hundred six thousand, five hundred sixty-one".