8405642 has 8 divisors (see below), whose sum is σ = 14409696. Its totient is φ = 3602412.

The previous prime is 8405629. The next prime is 8405647. The reversal of 8405642 is 2465048.

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

It is not an unprimeable number, because it can be changed into a prime (8405647) 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, 300188 + ... + 300215.

It is an arithmetic number, because the mean of its divisors is an integer number (1801212).

Almost surely, 2^8405642 is an apocalyptic number.

8405642 is a deficient number, since it is larger than the sum of its proper divisors (6004054).

8405642 is a wasteful number, since it uses less digits than its factorization.

8405642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600412.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 8405642 is about 2899.2485233246. The cubic root of 8405642 is about 203.3247731473.

The spelling of 8405642 in words is "eight million, four hundred five thousand, six hundred forty-two".