3765406 has 4 divisors (see below), whose sum is σ = 5648112. Its totient is φ = 1882702.

The previous prime is 3765397. The next prime is 3765409. The reversal of 3765406 is 6045673.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6045673 = 137 ⋅44129.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3765409) 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 as a sum of consecutive naturals, namely, 941350 + ... + 941353.

It is an arithmetic number, because the mean of its divisors is an integer number (1412028).

Almost surely, 2^3765406 is an apocalyptic number.

3765406 is a deficient number, since it is larger than the sum of its proper divisors (1882706).

3765406 is a wasteful number, since it uses less digits than its factorization.

3765406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882705.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 3765406 is about 1940.4654080916. The cubic root of 3765406 is about 155.5740902707.

The spelling of 3765406 in words is "three million, seven hundred sixty-five thousand, four hundred six".