2540477 has 4 divisors (see below), whose sum is σ = 2545596. Its totient is φ = 2535360.

The previous prime is 2540443. The next prime is 2540479. The reversal of 2540477 is 7740452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 498436 + 2042041 = 706^2 + 1429^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540477 - 2⁶ = 2540413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540479) 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, 1724 + ... + 2837.

It is an arithmetic number, because the mean of its divisors is an integer number (636399).

2^2540477 is an apocalyptic number.

It is an amenable number.

2540477 is a deficient number, since it is larger than the sum of its proper divisors (5119).

2540477 is an equidigital number, since it uses as much as digits as its factorization.

2540477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 2540477 is about 1593.8873862353. The cubic root of 2540477 is about 136.4494394271.

The spelling of 2540477 in words is "two million, five hundred forty thousand, four hundred seventy-seven".