2405540 has 12 divisors (see below), whose sum is σ = 5051676. Its totient is φ = 962208.

The previous prime is 2405539. The next prime is 2405561. The reversal of 2405540 is 455042.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 495616 + 1909924 = 704^2 + 1382^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 120277 = 2405540 / (2 + 4 + 0 + 5 + 5 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60119 + ... + 60158.

It is an arithmetic number, because the mean of its divisors is an integer number (420973).

2^2405540 is an apocalyptic number.

2405540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2405540 is an abundant number, since it is smaller than the sum of its proper divisors (2646136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2405540 is a wasteful number, since it uses less digits than its factorization.

2405540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120286 (or 120284 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 2405540 is about 1550.9803351429. The cubic root of 2405540 is about 133.9895291440.

The spelling of 2405540 in words is "two million, four hundred five thousand, five hundred forty".