2397905 has 4 divisors (see below), whose sum is σ = 2877492. Its totient is φ = 1918320.

The previous prime is 2397869. The next prime is 2397907. The reversal of 2397905 is 5097932.

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 1745041 + 652864 = 1321^2 + 808^2 .

It is not a de Polignac number, because 2397905 - 2⁸ = 2397649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2397907) 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, 239786 + ... + 239795.

It is an arithmetic number, because the mean of its divisors is an integer number (719373).

2^2397905 is an apocalyptic number.

It is an amenable number.

2397905 is a deficient number, since it is larger than the sum of its proper divisors (479587).

2397905 is an equidigital number, since it uses as much as digits as its factorization.

2397905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479586.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 2397905 is about 1548.5170325185. The cubic root of 2397905 is about 133.8476213968.

The spelling of 2397905 in words is "two million, three hundred ninety-seven thousand, nine hundred five".