2540407 has 2 divisors, whose sum is σ = 2540408. Its totient is φ = 2540406.

The previous prime is 2540393. The next prime is 2540413. The reversal of 2540407 is 7040452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2540407 - 2¹¹ = 2538359 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2550407) 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 as a sum of consecutive naturals, namely, 1270203 + 1270204.

It is an arithmetic number, because the mean of its divisors is an integer number (1270204).

2^2540407 is an apocalyptic number.

2540407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540407 is an equidigital number, since it uses as much as digits as its factorization.

2540407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 2540407 is about 1593.8654271926. The cubic root of 2540407 is about 136.4481861784.

Adding to 2540407 its reverse (7040452), we get a palindrome (9580859).

The spelling of 2540407 in words is "two million, five hundred forty thousand, four hundred seven".