2545787 has 4 divisors (see below), whose sum is σ = 2552256. Its totient is φ = 2539320.

The previous prime is 2545783. The next prime is 2545811. The reversal of 2545787 is 7875452.

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

It is a cyclic number.

It is not a de Polignac number, because 2545787 - 2² = 2545783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2545787.

It is not an unprimeable number, because it can be changed into a prime (2545783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2603 + ... + 3444.

It is an arithmetic number, because the mean of its divisors is an integer number (638064).

2^2545787 is an apocalyptic number.

2545787 is a deficient number, since it is larger than the sum of its proper divisors (6469).

2545787 is an equidigital number, since it uses as much as digits as its factorization.

2545787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468.

The product of its digits is 78400, while the sum is 38.

The square root of 2545787 is about 1595.5522554902. The cubic root of 2545787 is about 136.5444402613.

The spelling of 2545787 in words is "two million, five hundred forty-five thousand, seven hundred eighty-seven".