3961217 has 4 divisors (see below), whose sum is σ = 4265940. Its totient is φ = 3656496.

The previous prime is 3961213. The next prime is 3961229. The reversal of 3961217 is 7121693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2421136 + 1540081 = 1556^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 3961217 - 2² = 3961213 is a prime.

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 3961217.

It is not an unprimeable number, because it can be changed into a prime (3961213) 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, 152342 + ... + 152367.

It is an arithmetic number, because the mean of its divisors is an integer number (1066485).

Almost surely, 2^3961217 is an apocalyptic number.

It is an amenable number.

3961217 is a deficient number, since it is larger than the sum of its proper divisors (304723).

3961217 is a wasteful number, since it uses less digits than its factorization.

3961217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304722.

The product of its digits is 2268, while the sum is 29.

The square root of 3961217 is about 1990.2806334786. The cubic root of 3961217 is about 158.2254033300.

The spelling of 3961217 in words is "three million, nine hundred sixty-one thousand, two hundred seventeen".