3909261 has 8 divisors (see below), whose sum is σ = 5234944. Its totient is φ = 2594880.

The previous prime is 3909253. The next prime is 3909263. The reversal of 3909261 is 1629093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3909261 - 2³ = 3909253 is a prime.

It is a super-2 number, since 2×3909261² = 30564643132242, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981 + ... + 3426.

It is an arithmetic number, because the mean of its divisors is an integer number (654368).

Almost surely, 2^3909261 is an apocalyptic number.

It is an amenable number.

3909261 is a deficient number, since it is larger than the sum of its proper divisors (1325683).

3909261 is a wasteful number, since it uses less digits than its factorization.

3909261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5651.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 3909261 is about 1977.1851203163. The cubic root of 3909261 is about 157.5305861485.

The spelling of 3909261 in words is "three million, nine hundred nine thousand, two hundred sixty-one".