2861965 has 8 divisors (see below), whose sum is σ = 3481848. Its totient is φ = 2257920.

The previous prime is 2861941. The next prime is 2861977. The reversal of 2861965 is 5691682.

It can be written as a sum of positive squares in 4 ways, for example, as 218089 + 2643876 = 467^2 + 1626^2 .

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

It is not a de Polignac number, because 2861965 - 2¹⁹ = 2337677 is a prime.

It is a super-2 number, since 2×2861965² = 16381687322450, which contains 22 as substring.

It is a Duffinian number.

2861965 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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, 3556 + ... + 4285.

It is an arithmetic number, because the mean of its divisors is an integer number (435231).

2^2861965 is an apocalyptic number.

It is an amenable number.

2861965 is a deficient number, since it is larger than the sum of its proper divisors (619883).

2861965 is an equidigital number, since it uses as much as digits as its factorization.

2861965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919.

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

The square root of 2861965 is about 1691.7343172023. The cubic root of 2861965 is about 141.9781259701.

The spelling of 2861965 in words is "two million, eight hundred sixty-one thousand, nine hundred sixty-five".