3905261 has 4 divisors (see below), whose sum is σ = 3909312. Its totient is φ = 3901212.

The previous prime is 3905221. The next prime is 3905263. The reversal of 3905261 is 1625093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1625093 = 227 ⋅7159.

It is a cyclic number.

It is not a de Polignac number, because 3905261 - 2⁶ = 3905197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3905261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905263) 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, 350 + ... + 2816.

It is an arithmetic number, because the mean of its divisors is an integer number (977328).

Almost surely, 2^3905261 is an apocalyptic number.

It is an amenable number.

3905261 is a deficient number, since it is larger than the sum of its proper divisors (4051).

3905261 is a wasteful number, since it uses less digits than its factorization.

3905261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 3905261 is about 1976.1733223581. The cubic root of 3905261 is about 157.4768387879.

The spelling of 3905261 in words is "three million, nine hundred five thousand, two hundred sixty-one".