8409742 has 48 divisors (see below), whose sum is σ = 15321600. Its totient is φ = 3445200.

The previous prime is 8409721. The next prime is 8409829. The reversal of 8409742 is 2479048.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8409698 and 8409707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142509 + ... + 142567.

It is an arithmetic number, because the mean of its divisors is an integer number (319200).

Almost surely, 2^8409742 is an apocalyptic number.

8409742 is a deficient number, since it is larger than the sum of its proper divisors (6911858).

8409742 is a wasteful number, since it uses less digits than its factorization.

8409742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 8409742 is about 2899.9555169002. The cubic root of 8409742 is about 203.3578261875.

The spelling of 8409742 in words is "eight million, four hundred nine thousand, seven hundred forty-two".