7428742 has 8 divisors (see below), whose sum is σ = 11179656. Its totient is φ = 3702192.

The previous prime is 7428737. The next prime is 7428761. The reversal of 7428742 is 2478247.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7428698 and 7428707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5308 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (1397457).

Almost surely, 2^7428742 is an apocalyptic number.

7428742 is a deficient number, since it is larger than the sum of its proper divisors (3750914).

7428742 is a wasteful number, since it uses less digits than its factorization.

7428742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12182.

The product of its digits is 25088, while the sum is 34.

The square root of 7428742 is about 2725.5718665997. The cubic root of 7428742 is about 195.1214846765.

The spelling of 7428742 in words is "seven million, four hundred twenty-eight thousand, seven hundred forty-two".