2405287 has 4 divisors (see below), whose sum is σ = 2408616. Its totient is φ = 2401960.

The previous prime is 2405269. The next prime is 2405297. The reversal of 2405287 is 7825042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2405287 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 (2405297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73 + ... + 2194.

It is an arithmetic number, because the mean of its divisors is an integer number (602154).

2^2405287 is an apocalyptic number.

2405287 is a deficient number, since it is larger than the sum of its proper divisors (3329).

2405287 is a wasteful number, since it uses less digits than its factorization.

2405287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2405287 is about 1550.8987716805. The cubic root of 2405287 is about 133.9848315792.

The spelling of 2405287 in words is "two million, four hundred five thousand, two hundred eighty-seven".