3940517 has 4 divisors (see below), whose sum is σ = 4503456. Its totient is φ = 3377580.

The previous prime is 3940513. The next prime is 3940523. The reversal of 3940517 is 7150493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3940517 - 2² = 3940513 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3940517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940513) 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, 281459 + ... + 281472.

It is an arithmetic number, because the mean of its divisors is an integer number (1125864).

Almost surely, 2^3940517 is an apocalyptic number.

It is an amenable number.

3940517 is a deficient number, since it is larger than the sum of its proper divisors (562939).

3940517 is an equidigital number, since it uses as much as digits as its factorization.

3940517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562938.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 3940517 is about 1985.0735502746. The cubic root of 3940517 is about 157.9493107707.

The spelling of 3940517 in words is "three million, nine hundred forty thousand, five hundred seventeen".