7645842 has 12 divisors (see below), whose sum is σ = 16566030. Its totient is φ = 2548608.

The previous prime is 7645837. The next prime is 7645843. The reversal of 7645842 is 2485467.

7645842 is a `hidden beast` number, since 7 + 645 + 8 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7568001 + 77841 = 2751^2 + 279^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7645797 and 7645806.

It is not an unprimeable number, because it can be changed into a prime (7645843) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 212367 + ... + 212402.

Almost surely, 2^7645842 is an apocalyptic number.

7645842 is an abundant number, since it is smaller than the sum of its proper divisors (8920188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7645842 is a wasteful number, since it uses less digits than its factorization.

7645842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424777 (or 424774 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 7645842 is about 2765.1115709859. Note that the first 3 decimals coincide. The cubic root of 7645842 is about 197.0040281929.

The spelling of 7645842 in words is "seven million, six hundred forty-five thousand, eight hundred forty-two".