2856961 has 2 divisors, whose sum is σ = 2856962. Its totient is φ = 2856960.

The previous prime is 2856923. The next prime is 2856967. The reversal of 2856961 is 1696582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1806336 + 1050625 = 1344^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2856961 - 2⁹ = 2856449 is a prime.

2856961 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2856961.

It is not a weakly prime, because it can be changed into another prime (2856967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428480 + 1428481.

It is an arithmetic number, because the mean of its divisors is an integer number (1428481).

It is a Proth number, since it is equal to 1395 ⋅ 2¹¹ + 1 and 1395 < 2¹¹.

2^2856961 is an apocalyptic number.

It is an amenable number.

2856961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2856961 is an equidigital number, since it uses as much as digits as its factorization.

2856961 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 2856961 is about 1690.2547145327. The cubic root of 2856961 is about 141.8953305234.

The spelling of 2856961 in words is "two million, eight hundred fifty-six thousand, nine hundred sixty-one".