2865261 has 16 divisors (see below), whose sum is σ = 4460544. Its totient is φ = 1601904.

The previous prime is 2865259. The next prime is 2865277. The reversal of 2865261 is 1625682.

It is not a de Polignac number, because 2865261 - 2¹ = 2865259 is a prime.

2865261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 465 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (278784).

2^2865261 is an apocalyptic number.

2865261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2865261 is a deficient number, since it is larger than the sum of its proper divisors (1595283).

2865261 is a wasteful number, since it uses less digits than its factorization.

2865261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960.

The product of its digits is 5760, while the sum is 30.

The square root of 2865261 is about 1692.7081851282. The cubic root of 2865261 is about 142.0326083944.

The spelling of 2865261 in words is "two million, eight hundred sixty-five thousand, two hundred sixty-one".