8121210 has 32 divisors (see below), whose sum is σ = 19619712. Its totient is φ = 2151360.

The previous prime is 8121209. The next prime is 8121283. The reversal of 8121210 is 121218.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 8121210.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4200 + ... + 5820.

It is an arithmetic number, because the mean of its divisors is an integer number (613116).

Almost surely, 2^8121210 is an apocalyptic number.

8121210 is an abundant number, since it is smaller than the sum of its proper divisors (11498502).

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

8121210 is a wasteful number, since it uses less digits than its factorization.

8121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 8121210 is about 2849.7736752241. The cubic root of 8121210 is about 201.0050245025.

Adding to 8121210 its reverse (121218), we get a palindrome (8242428).

The spelling of 8121210 in words is "eight million, one hundred twenty-one thousand, two hundred ten".