2505866 has 8 divisors (see below), whose sum is σ = 4100544. Its totient is φ = 1139020.

The previous prime is 2505863. The next prime is 2505901. The reversal of 2505866 is 6685052.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2505863) 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, 56930 + ... + 56973.

It is an arithmetic number, because the mean of its divisors is an integer number (512568).

2^2505866 is an apocalyptic number.

2505866 is a deficient number, since it is larger than the sum of its proper divisors (1594678).

2505866 is a wasteful number, since it uses less digits than its factorization.

2505866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113916.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2505866 is about 1582.9927352960. The cubic root of 2505866 is about 135.8269497378.

It can be divided in two parts, 250 and 5866, that added together give a palindrome (6116).

The spelling of 2505866 in words is "two million, five hundred five thousand, eight hundred sixty-six".