2896561 has 2 divisors, whose sum is σ = 2896562. Its totient is φ = 2896560.

The previous prime is 2896559. The next prime is 2896571. The reversal of 2896561 is 1656982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2890000 + 6561 = 1700^2 + 81^2 .

It is a cyclic number.

It is not a de Polignac number, because 2896561 - 2¹ = 2896559 is a prime.

Together with 2896559, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2896561.

It is not a weakly prime, because it can be changed into another prime (2896501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1448280 + 1448281.

It is an arithmetic number, because the mean of its divisors is an integer number (1448281).

2^2896561 is an apocalyptic number.

It is an amenable number.

2896561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2896561 is an equidigital number, since it uses as much as digits as its factorization.

2896561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 2896561 is about 1701.9286118989. The cubic root of 2896561 is about 142.5479227348.

It can be divided in two parts, 289 and 6561, that multiplied together give a square (1896129 = 1377²).

The spelling of 2896561 in words is "two million, eight hundred ninety-six thousand, five hundred sixty-one".