7866542 has 8 divisors (see below), whose sum is σ = 11812296. Its totient is φ = 3929112.

The previous prime is 7866541. The next prime is 7866557. The reversal of 7866542 is 2456687.

It is a happy number.

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

It is a d-powerful number, because it can be written as 7⁸ + 8 + 6³ + 6³ + 5⁵ + 4⁵ + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 7866496 and 7866505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7866541) 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, 1553 + ... + 4259.

It is an arithmetic number, because the mean of its divisors is an integer number (1476537).

Almost surely, 2^7866542 is an apocalyptic number.

7866542 is a deficient number, since it is larger than the sum of its proper divisors (3945754).

7866542 is a wasteful number, since it uses less digits than its factorization.

7866542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4162.

The product of its digits is 80640, while the sum is 38.

The square root of 7866542 is about 2804.7356381663. The cubic root of 7866542 is about 198.8816076501.

The spelling of 7866542 in words is "seven million, eight hundred sixty-six thousand, five hundred forty-two".