3970905 has 16 divisors (see below), whose sum is σ = 6688320. Its totient is φ = 2006208.

The previous prime is 3970903. The next prime is 3970949. The reversal of 3970905 is 5090793.

It is not a de Polignac number, because 3970905 - 2¹ = 3970903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3970903) 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, 6682 + ... + 7251.

It is an arithmetic number, because the mean of its divisors is an integer number (418020).

Almost surely, 2^3970905 is an apocalyptic number.

It is an amenable number.

3970905 is a deficient number, since it is larger than the sum of its proper divisors (2717415).

3970905 is a wasteful number, since it uses less digits than its factorization.

3970905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13960.

The product of its (nonzero) digits is 8505, while the sum is 33.

The square root of 3970905 is about 1992.7129748160. The cubic root of 3970905 is about 158.3542896239.

The spelling of 3970905 in words is "three million, nine hundred seventy thousand, nine hundred five".