3240905 has 4 divisors (see below), whose sum is σ = 3889092. Its totient is φ = 2592720.

The previous prime is 3240877. The next prime is 3240911. The reversal of 3240905 is 5090423.

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 2050624 + 1190281 = 1432^2 + 1091^2 .

It is not a de Polignac number, because 3240905 - 2⁶ = 3240841 is a prime.

It is a Duffinian 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, 324086 + ... + 324095.

It is an arithmetic number, because the mean of its divisors is an integer number (972273).

Almost surely, 2^3240905 is an apocalyptic number.

It is an amenable number.

3240905 is a deficient number, since it is larger than the sum of its proper divisors (648187).

3240905 is an equidigital number, since it uses as much as digits as its factorization.

3240905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648186.

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

The square root of 3240905 is about 1800.2513713368. The cubic root of 3240905 is about 147.9865004731.

The spelling of 3240905 in words is "three million, two hundred forty thousand, nine hundred five".