3765381 has 24 divisors (see below), whose sum is σ = 5511264. Its totient is φ = 2284800.

The previous prime is 3765373. The next prime is 3765383. The reversal of 3765381 is 1835673.

3765381 = T₂₂₁ + T₂₂₂ + ... + T₃₂₁.

It is a happy number.

3765381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3765381 - 2³ = 3765373 is a prime.

It is a super-2 number, since 2×3765381² = 28356188150322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3765383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37231 + ... + 37331.

It is an arithmetic number, because the mean of its divisors is an integer number (229636).

Almost surely, 2^3765381 is an apocalyptic number.

It is an amenable number.

3765381 is a deficient number, since it is larger than the sum of its proper divisors (1745883).

3765381 is a wasteful number, since it uses less digits than its factorization.

3765381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 164 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 3765381 is about 1940.4589663273. The cubic root of 3765381 is about 155.5737459642.

The spelling of 3765381 in words is "three million, seven hundred sixty-five thousand, three hundred eighty-one".