2540505 has 32 divisors (see below), whose sum is σ = 4510080. Its totient is φ = 1210880.

The previous prime is 2540479. The next prime is 2540513. The reversal of 2540505 is 5050452.

It is not a de Polignac number, because 2540505 - 2⁶ = 2540441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14599 + ... + 14771.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2^2540505 is an apocalyptic number.

It is an amenable number.

2540505 is a deficient number, since it is larger than the sum of its proper divisors (1969575).

2540505 is a wasteful number, since it uses less digits than its factorization.

2540505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 2540505 is about 1593.8961697677. The cubic root of 2540505 is about 136.4499407201.

Adding to 2540505 its reverse (5050452), we get a palindrome (7590957).

The spelling of 2540505 in words is "two million, five hundred forty thousand, five hundred five".