7820542 has 8 divisors (see below), whose sum is σ = 12047976. Its totient is φ = 3804552.

The previous prime is 7820507. The next prime is 7820551. The reversal of 7820542 is 2450287.

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

It is a super-2 number, since 2×7820542² = 122321754347528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7820542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52768 + ... + 52915.

It is an arithmetic number, because the mean of its divisors is an integer number (1505997).

Almost surely, 2^7820542 is an apocalyptic number.

7820542 is a deficient number, since it is larger than the sum of its proper divisors (4227434).

7820542 is a wasteful number, since it uses less digits than its factorization.

7820542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105722.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 7820542 is about 2796.5231985449. The cubic root of 7820542 is about 198.4931928372.

The spelling of 7820542 in words is "seven million, eight hundred twenty thousand, five hundred forty-two".