3942609 has 16 divisors (see below), whose sum is σ = 5891520. Its totient is φ = 2324160.

The previous prime is 3942581. The next prime is 3942619. The reversal of 3942609 is 9062493.

It is not a de Polignac number, because 3942609 - 2⁵ = 3942577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3942609.

It is not an unprimeable number, because it can be changed into a prime (3942619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394 + ... + 2835.

It is an arithmetic number, because the mean of its divisors is an integer number (368220).

Almost surely, 2^3942609 is an apocalyptic number.

It is an amenable number.

3942609 is a deficient number, since it is larger than the sum of its proper divisors (1948911).

3942609 is a wasteful number, since it uses less digits than its factorization.

3942609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 3942609 is about 1985.6004129734. The cubic root of 3942609 is about 157.9772573151.

It can be divided in two parts, 394 and 2609, that added together give a palindrome (3003).

The spelling of 3942609 in words is "three million, nine hundred forty-two thousand, six hundred nine".