3909742 has 8 divisors (see below), whose sum is σ = 5989536. Its totient is φ = 1913232.

The previous prime is 3909739. The next prime is 3909749. The reversal of 3909742 is 2479093.

3909742 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3909698 and 3909707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909749) 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 3 ways as a sum of consecutive naturals, for example, 20703 + ... + 20890.

It is an arithmetic number, because the mean of its divisors is an integer number (748692).

Almost surely, 2^3909742 is an apocalyptic number.

3909742 is a deficient number, since it is larger than the sum of its proper divisors (2079794).

3909742 is a wasteful number, since it uses less digits than its factorization.

3909742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41642.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 3909742 is about 1977.3067541482. The cubic root of 3909742 is about 157.5370467988.

The spelling of 3909742 in words is "three million, nine hundred nine thousand, seven hundred forty-two".