2540445 has 16 divisors (see below), whose sum is σ = 4086720. Its totient is φ = 1347584.

The previous prime is 2540443. The next prime is 2540479. The reversal of 2540445 is 5440452.

It is a cyclic number.

It is not a de Polignac number, because 2540445 - 2¹ = 2540443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540441) 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, 3526 + ... + 4184.

It is an arithmetic number, because the mean of its divisors is an integer number (255420).

2^2540445 is an apocalyptic number.

It is an amenable number.

2540445 is a deficient number, since it is larger than the sum of its proper divisors (1546275).

2540445 is a wasteful number, since it uses less digits than its factorization.

2540445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 2540445 is about 1593.8773478533. The cubic root of 2540445 is about 136.4488665162.

Adding to 2540445 its reverse (5440452), we get a palindrome (7980897).

It can be divided in two parts, 25 and 40445, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 2540445 in words is "two million, five hundred forty thousand, four hundred forty-five".