3917145 has 16 divisors (see below), whose sum is σ = 6325632. Its totient is φ = 2069760.

The previous prime is 3917131. The next prime is 3917149. The reversal of 3917145 is 5417193.

It is not a de Polignac number, because 3917145 - 2⁵ = 3917113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3917149) 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 15 ways as a sum of consecutive naturals, for example, 540 + ... + 2850.

It is an arithmetic number, because the mean of its divisors is an integer number (395352).

Almost surely, 2^3917145 is an apocalyptic number.

It is an amenable number.

3917145 is a deficient number, since it is larger than the sum of its proper divisors (2408487).

3917145 is a wasteful number, since it uses less digits than its factorization.

3917145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432.

The product of its digits is 3780, while the sum is 30.

The square root of 3917145 is about 1979.1778596175. The cubic root of 3917145 is about 157.6364149450.

The spelling of 3917145 in words is "three million, nine hundred seventeen thousand, one hundred forty-five".