2506805 has 16 divisors (see below), whose sum is σ = 3492480. Its totient is φ = 1691712.

The previous prime is 2506799. The next prime is 2506807. The reversal of 2506805 is 5086052.

It is a cyclic number.

It is not a de Polignac number, because 2506805 - 2⁸ = 2506549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1811 + ... + 2879.

It is an arithmetic number, because the mean of its divisors is an integer number (218280).

2^2506805 is an apocalyptic number.

It is an amenable number.

2506805 is a deficient number, since it is larger than the sum of its proper divisors (985675).

2506805 is a wasteful number, since it uses less digits than its factorization.

2506805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2506805 is about 1583.2892976333. The cubic root of 2506805 is about 135.8439133449.

The spelling of 2506805 in words is "two million, five hundred six thousand, eight hundred five".