2602861 has 4 divisors (see below), whose sum is σ = 2608092. Its totient is φ = 2597632.

The previous prime is 2602849. The next prime is 2602877. The reversal of 2602861 is 1682062.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1425636 + 1177225 = 1194^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 2602861 - 2⁹ = 2602349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2602261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780 + ... + 2893.

It is an arithmetic number, because the mean of its divisors is an integer number (652023).

2^2602861 is an apocalyptic number.

It is an amenable number.

2602861 is a deficient number, since it is larger than the sum of its proper divisors (5231).

2602861 is an equidigital number, since it uses as much as digits as its factorization.

2602861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5230.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2602861 is about 1613.3384641792. The cubic root of 2602861 is about 137.5573050396.

The spelling of 2602861 in words is "two million, six hundred two thousand, eight hundred sixty-one".