2551445 has 16 divisors (see below), whose sum is σ = 3492720. Its totient is φ = 1772544.

The previous prime is 2551441. The next prime is 2551457. The reversal of 2551445 is 5441552.

It can be written as a sum of positive squares in 8 ways, for example, as 10609 + 2540836 = 103^2 + 1594^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551445 - 2² = 2551441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551441) 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 15 ways as a sum of consecutive naturals, for example, 50 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (218295).

2^2551445 is an apocalyptic number.

It is an amenable number.

2551445 is a deficient number, since it is larger than the sum of its proper divisors (941275).

2551445 is a wasteful number, since it uses less digits than its factorization.

2551445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344.

The product of its digits is 4000, while the sum is 26.

The square root of 2551445 is about 1597.3243252389. The cubic root of 2551445 is about 136.6455218791.

Adding to 2551445 its reverse (5441552), we get a palindrome (7992997).

The spelling of 2551445 in words is "two million, five hundred fifty-one thousand, four hundred forty-five".