3781355 has 4 divisors (see below), whose sum is σ = 4537632. Its totient is φ = 3025080.

The previous prime is 3781313. The next prime is 3781367. The reversal of 3781355 is 5531873.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3781355 - 2¹⁸ = 3519211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378131 + ... + 378140.

It is an arithmetic number, because the mean of its divisors is an integer number (1134408).

Almost surely, 2^3781355 is an apocalyptic number.

3781355 is a deficient number, since it is larger than the sum of its proper divisors (756277).

3781355 is an equidigital number, since it uses as much as digits as its factorization.

3781355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756276.

The product of its digits is 12600, while the sum is 32.

The square root of 3781355 is about 1944.5706466981. The cubic root of 3781355 is about 155.7934341375.

The spelling of 3781355 in words is "three million, seven hundred eighty-one thousand, three hundred fifty-five".