2604861 has 24 divisors (see below), whose sum is σ = 4343040. Its totient is φ = 1473696.

The previous prime is 2604857. The next prime is 2604869. The reversal of 2604861 is 1684062.

It is not a de Polignac number, because 2604861 - 2² = 2604857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10780 + ... + 11018.

It is an arithmetic number, because the mean of its divisors is an integer number (180960).

2^2604861 is an apocalyptic number.

2604861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2604861 is a deficient number, since it is larger than the sum of its proper divisors (1738179).

2604861 is a wasteful number, since it uses less digits than its factorization.

2604861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2604861 is about 1613.9581778968. The cubic root of 2604861 is about 137.5925283542.

The spelling of 2604861 in words is "two million, six hundred four thousand, eight hundred sixty-one".