8421742 has 16 divisors (see below), whose sum is σ = 14745600. Its totient is φ = 3532248.

The previous prime is 8421737. The next prime is 8421757. The reversal of 8421742 is 2471248.

It is a d-powerful number, because it can be written as 8⁵ + 4 + 2 + 1 + 7³ + 4² + 2²³ .

It is a self number, because there is not a number n which added to its sum of digits gives 8421742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5742 + ... + 7057.

It is an arithmetic number, because the mean of its divisors is an integer number (921600).

Almost surely, 2^8421742 is an apocalyptic number.

8421742 is a deficient number, since it is larger than the sum of its proper divisors (6323858).

8421742 is a wasteful number, since it uses less digits than its factorization.

8421742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12855.

The product of its digits is 3584, while the sum is 28.

The square root of 8421742 is about 2902.0237766083. The cubic root of 8421742 is about 203.4545051001.

The spelling of 8421742 in words is "eight million, four hundred twenty-one thousand, seven hundred forty-two".