3945007 has 4 divisors (see below), whose sum is σ = 4303656. Its totient is φ = 3586360.

The previous prime is 3944999. The next prime is 3945013. The reversal of 3945007 is 7005493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7005493 = 11 ⋅636863.

It is a cyclic number.

It is not a de Polignac number, because 3945007 - 2³ = 3944999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179308 + ... + 179329.

It is an arithmetic number, because the mean of its divisors is an integer number (1075914).

Almost surely, 2^3945007 is an apocalyptic number.

3945007 is a deficient number, since it is larger than the sum of its proper divisors (358649).

3945007 is a wasteful number, since it uses less digits than its factorization.

3945007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358648.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 3945007 is about 1986.2041687601. The cubic root of 3945007 is about 158.0092794849.

The spelling of 3945007 in words is "three million, nine hundred forty-five thousand, seven".