2505783 has 16 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 1347456.

The previous prime is 2505779. The next prime is 2505791. The reversal of 2505783 is 3875052.

It is a happy number.

It is not a de Polignac number, because 2505783 - 2² = 2505779 is a prime.

2505783 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2505783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505743) 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, 3153 + ... + 3866.

It is an arithmetic number, because the mean of its divisors is an integer number (252720).

2^2505783 is an apocalyptic number.

2505783 is a deficient number, since it is larger than the sum of its proper divisors (1537737).

2505783 is a wasteful number, since it uses less digits than its factorization.

2505783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7046.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2505783 is about 1582.9665189131. The cubic root of 2505783 is about 135.8254500885.

The spelling of 2505783 in words is "two million, five hundred five thousand, seven hundred eighty-three".