2430905 has 4 divisors (see below), whose sum is σ = 2917092. Its totient is φ = 1944720.

The previous prime is 2430877. The next prime is 2430913. The reversal of 2430905 is 5090342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5090342 = 2 ⋅2545171.

It can be written as a sum of positive squares in 2 ways, for example, as 659344 + 1771561 = 812^2 + 1331^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2430905 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 243086 + ... + 243095.

It is an arithmetic number, because the mean of its divisors is an integer number (729273).

2^2430905 is an apocalyptic number.

It is an amenable number.

2430905 is a deficient number, since it is larger than the sum of its proper divisors (486187).

2430905 is an equidigital number, since it uses as much as digits as its factorization.

2430905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486186.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2430905 is about 1559.1359786754. The cubic root of 2430905 is about 134.4588303305.

The spelling of 2430905 in words is "two million, four hundred thirty thousand, nine hundred five".