3778261 has 6 divisors (see below), whose sum is σ = 3836130. Its totient is φ = 3721248.

The previous prime is 3778253. The next prime is 3778297. The reversal of 3778261 is 1628773.

It can be written as a sum of positive squares in 3 ways, for example, as 240100 + 3538161 = 490^2 + 1881^2 .

It is not a de Polignac number, because 3778261 - 2³ = 3778253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778241) 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 5 ways as a sum of consecutive naturals, for example, 4975 + ... + 5683.

It is an arithmetic number, because the mean of its divisors is an integer number (639355).

Almost surely, 2^3778261 is an apocalyptic number.

It is an amenable number.

3778261 is a deficient number, since it is larger than the sum of its proper divisors (57869).

3778261 is an frugal number, since it uses more digits than its factorization.

3778261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 782 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 3778261 is about 1943.7749355314. The cubic root of 3778261 is about 155.7509311711.

The spelling of 3778261 in words is "three million, seven hundred seventy-eight thousand, two hundred sixty-one".