3249905 has 4 divisors (see below), whose sum is σ = 3899892. Its totient is φ = 2599920.

The previous prime is 3249901. The next prime is 3249913. The reversal of 3249905 is 5099423.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5099423 = 7 ⋅728489.

It can be written as a sum of positive squares in 2 ways, for example, as 2119936 + 1129969 = 1456^2 + 1063^2 .

It is not a de Polignac number, because 3249905 - 2² = 3249901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3249901) 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, 324986 + ... + 324995.

It is an arithmetic number, because the mean of its divisors is an integer number (974973).

Almost surely, 2^3249905 is an apocalyptic number.

It is an amenable number.

3249905 is a deficient number, since it is larger than the sum of its proper divisors (649987).

3249905 is an equidigital number, since it uses as much as digits as its factorization.

3249905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649986.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 3249905 is about 1802.7492892801. The cubic root of 3249905 is about 148.1233601390.

The spelling of 3249905 in words is "three million, two hundred forty-nine thousand, nine hundred five".