7821164 has 12 divisors (see below), whose sum is σ = 14739984. Its totient is φ = 3609744.

The previous prime is 7821133. The next prime is 7821167. The reversal of 7821164 is 4611287.

It is a super-2 number, since 2×7821164² = 122341212629792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7821167) 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, 75152 + ... + 75255.

It is an arithmetic number, because the mean of its divisors is an integer number (1228332).

Almost surely, 2^7821164 is an apocalyptic number.

It is an amenable number.

7821164 is a deficient number, since it is larger than the sum of its proper divisors (6918820).

7821164 is a wasteful number, since it uses less digits than its factorization.

7821164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150424 (or 150422 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 7821164 is about 2796.6344058529. The cubic root of 7821164 is about 198.4984550254.

The spelling of 7821164 in words is "seven million, eight hundred twenty-one thousand, one hundred sixty-four".