2312405 has 4 divisors (see below), whose sum is σ = 2774892. Its totient is φ = 1849920.

The previous prime is 2312381. The next prime is 2312407. The reversal of 2312405 is 5042132.

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 1825201 + 487204 = 1351^2 + 698^2 .

It is not a de Polignac number, because 2312405 - 2⁶ = 2312341 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 (2312407) 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, 231236 + ... + 231245.

It is an arithmetic number, because the mean of its divisors is an integer number (693723).

2^2312405 is an apocalyptic number.

It is an amenable number.

2312405 is a deficient number, since it is larger than the sum of its proper divisors (462487).

2312405 is an equidigital number, since it uses as much as digits as its factorization.

2312405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462486.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2312405 is about 1520.6593964462. The cubic root of 2312405 is about 132.2375009479.

Adding to 2312405 its reverse (5042132), we get a palindrome (7354537).

It can be divided in two parts, 231 and 2405, that multiplied together give a palindrome (555555).

The spelling of 2312405 in words is "two million, three hundred twelve thousand, four hundred five".