3947205 has 16 divisors (see below), whose sum is σ = 6341760. Its totient is φ = 2096448.

The previous prime is 3947189. The next prime is 3947227. The reversal of 3947205 is 5027493.

It is not a de Polignac number, because 3947205 - 2⁴ = 3947189 is a prime.

3947205 is a lucky number.

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, 5019 + ... + 5751.

It is an arithmetic number, because the mean of its divisors is an integer number (396360).

Almost surely, 2^3947205 is an apocalyptic number.

It is an amenable number.

3947205 is a deficient number, since it is larger than the sum of its proper divisors (2394555).

3947205 is a wasteful number, since it uses less digits than its factorization.

3947205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 3947205 is about 1986.7574084422. The cubic root of 3947205 is about 158.0386195186.

The spelling of 3947205 in words is "three million, nine hundred forty-seven thousand, two hundred five".