3781285 has 16 divisors (see below), whose sum is σ = 4872960. Its totient is φ = 2808000.

The previous prime is 3781277. The next prime is 3781301. The reversal of 3781285 is 5821873.

It is not a de Polignac number, because 3781285 - 2³ = 3781277 is a prime.

3781285 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3781285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4660 + ... + 5410.

It is an arithmetic number, because the mean of its divisors is an integer number (304560).

Almost surely, 2^3781285 is an apocalyptic number.

It is an amenable number.

3781285 is a deficient number, since it is larger than the sum of its proper divisors (1091675).

3781285 is a wasteful number, since it uses less digits than its factorization.

3781285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its digits is 13440, while the sum is 34.

The square root of 3781285 is about 1944.5526477830. The cubic root of 3781285 is about 155.7924727883.

The spelling of 3781285 in words is "three million, seven hundred eighty-one thousand, two hundred eighty-five".