2875261 has 6 divisors (see below), whose sum is σ = 3054650. Its totient is φ = 2705856.

The previous prime is 2875211. The next prime is 2875267. The reversal of 2875261 is 1625782.

2875261 = T₁₃₈₃ + T₁₃₈₄ + T₁₃₈₅.

It can be written as a sum of positive squares in 3 ways, for example, as 1012036 + 1863225 = 1006^2 + 1365^2 .

It is not a de Polignac number, because 2875261 - 2⁷ = 2875133 is a prime.

It is a super-3 number, since 3×2875261³ = 71310433340809213743, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2875267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4686 + ... + 5263.

2^2875261 is an apocalyptic number.

2875261 is the 1385-th centered triangular number.

It is an amenable number.

2875261 is a deficient number, since it is larger than the sum of its proper divisors (179389).

2875261 is an equidigital number, since it uses as much as digits as its factorization.

2875261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9983 (or 9966 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 2875261 is about 1695.6594587357. The cubic root of 2875261 is about 142.1976517568.

It can be divided in two parts, 2875 and 261, that added together give a square (3136 = 56²).

The spelling of 2875261 in words is "two million, eight hundred seventy-five thousand, two hundred sixty-one".